true. ['facts/common_facts_2017_0001']. % facts/common_facts_2017_0001 compiled 0.00 sec, 100 clauses true. ['facts/common_facts_2017_0002']. Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/facts/common_facts_2017_0002.pl:275: Clauses of book/5 are not together in the source-file Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/facts/common_facts_2017_0002.pl:408: Clauses of philosophical_quotation/7 are not together in the source-file % facts/common_facts_2017_0002 compiled 0.00 sec, 180 clauses true. ['rules/common_2017_0001']. Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:43: Singleton variables: [Subject,Time,Type,Arity,Relation] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:45: Singleton variables: [Subject,Time,Type,A_Object] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:57: Singleton variables: [Type_p1,Relation,A_Object,B_Object,C_Object] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:61: Singleton variables: [Internal_Relation_symbol,A_Internal_Symbol,B_Internal_Symbol,C_Internal_Symbol] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:65: Singleton variables: [Type_p1] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:79: Singleton variables: [External_Relation_Symbol_2] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:91: Singleton variables: [Internal_Relation_Symbol,A_Internal_Symbol,B_Internal_Symbol,C_Internal_Symbol] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:95: Singleton variables: [Relation,A_Object,B_Object,C_Object] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:99: Singleton variables: [Internal_Relation_Symbol] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:103: Singleton variables: [Internal_Relation_symbol,A_Internal_Symbol,B_Internal_Symbol,C_Internal_Symbol] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:136: Singleton variables: [Logical_Form] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:166: Singleton variables: [Subject,Time] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:168: Singleton variables: [Subject,Time] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:176: Singleton variables: [Subject,Time] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:178: Singleton variables: [Subject,Time] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:223: Singleton variables: [Relation2] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:223: Singleton variable in \+: Logical_Form_2 Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:247: Singleton variables: [Number1A,Number1B,External_Term_2,NumberA,NumberB] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:253: Singleton variables: [Quote_1A,Quote_2A,Quote_3A,Quote_4A,Quote_1B,Quote_2B,Quote_3B,Quote_4B] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:259: Singleton variables: [Quote_1A,Quote_2A,Quote_3A,Quote_4A,Quote_1B,Quote_2B,Quote_3B,Quote_4B] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:289: Singleton variables: [Author_Book_Abbreviation] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/common_2017_0001.pl:291: Singleton variables: [Author_Article_Abbreviation] % rules/common_2017_0001 compiled 0.01 sec, 49 clauses true. ['rules/prolog_2017_0001']. Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/prolog_2017_0001.pl:27: Singleton variables: [Type,Arity] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/prolog_2017_0001.pl:36: Singleton variables: [Ignore] Warning: /home/dennis/darland_philosophy-01.23/darland_philosophy-01.23/DarlandPhilosophySwi/rules/prolog_2017_0001.pl:39: Singleton variables: [Ignore] % rules/prolog_2017_0001 compiled 0.00 sec, 13 clauses true. write_time(Ignore). will be time someday true. remark(4001, Remark). Remark = 'Test Set 4 - about understanding obout understanding. Also understanding about belief'. remark(4002, Remark). Remark = 'I have not checked this out thorougly - other things were prerequisites.'. understands_internal_and_understands_internal_object(Subject_1, Time_1, Subject_2, Time_2, 0, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2). Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = B_Internal_Symbol_1, B_Internal_Symbol_1 = quine_cicero_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int ; Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = quine_cicero_int, B_Internal_Symbol_1 = quine_tully_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int ; Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = quine_tully_int, B_Internal_Symbol_1 = quine_cicero_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int ; Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = B_Internal_Symbol_1, B_Internal_Symbol_1 = quine_tully_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int understands_internal_and_understands_internal_object(Subject_1, Time_1, Subject_2, Time_2, 1, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2). false. understands_internal_and_understands_internal_object(Subject_1, Time_1, Subject_2, Time_2, 2, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2). false. understands_internal_and_understands_internal_object(Subject_1, Time_1, Subject_2, Time_2, 3, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2). false. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% understands_internal_and_understands_external_object(Subject_1, Time_1, Subject_2, Time_2, 0, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_2, A_External_Symbol_2, B_External_Symbol_2, C_External_Symbol_2). Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = C_External_Symbol_2, C_External_Symbol_2 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = B_Internal_Symbol_1, B_Internal_Symbol_1 = quine_cicero_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int, External_Relation_Symbol_2 = denounced_ext, A_External_Symbol_2 = B_External_Symbol_2, B_External_Symbol_2 = cicero_ext ; Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = C_External_Symbol_2, C_External_Symbol_2 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = quine_cicero_int, B_Internal_Symbol_1 = quine_tully_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int, External_Relation_Symbol_2 = denounced_ext, A_External_Symbol_2 = B_External_Symbol_2, B_External_Symbol_2 = cicero_ext ; Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = C_External_Symbol_2, C_External_Symbol_2 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = quine_tully_int, B_Internal_Symbol_1 = quine_cicero_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int, External_Relation_Symbol_2 = denounced_ext, A_External_Symbol_2 = B_External_Symbol_2, B_External_Symbol_2 = cicero_ext ; Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = C_External_Symbol_2, C_External_Symbol_2 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = B_Internal_Symbol_1, B_Internal_Symbol_1 = quine_tully_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int, External_Relation_Symbol_2 = denounced_ext, A_External_Symbol_2 = B_External_Symbol_2, B_External_Symbol_2 = cicero_ext understands_internal_and_understands_external_object(Subject_1, Time_1, Subject_2, Time_2, 1, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_2, A_External_Symbol_2, B_External_Symbol_2, C_External_Symbol_2). false. understands_internal_and_understands_external_object(Subject_1, Time_1, Subject_2, Time_2, 2, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_2, A_External_Symbol_2, B_External_Symbol_2, C_External_Symbol_2). false. understands_internal_and_understands_external_object(Subject_1, Time_1, Subject_2, Time_2, 3, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_2, A_External_Symbol_2, B_External_Symbol_2, C_External_Symbol_2). false. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% understands_external_and_understands_internal_object(Subject_1, Time_1, Subject_2, Time_2, 0, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_1, A_External_Symbol_1, B_External_Symbol_1, C_External_Symbol_1). Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = C_External_Symbol_1, C_External_Symbol_1 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = B_Internal_Symbol_1, B_Internal_Symbol_1 = quine_cicero_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int, External_Relation_Symbol_1 = denounced_ext, A_External_Symbol_1 = B_External_Symbol_1, B_External_Symbol_1 = cicero_ext ; Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = C_External_Symbol_1, C_External_Symbol_1 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = quine_cicero_int, B_Internal_Symbol_1 = quine_tully_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int, External_Relation_Symbol_1 = denounced_ext, A_External_Symbol_1 = cicero_ext, B_External_Symbol_1 = tully_ext ; Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = C_External_Symbol_1, C_External_Symbol_1 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = quine_tully_int, B_Internal_Symbol_1 = quine_cicero_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int, External_Relation_Symbol_1 = denounced_ext, A_External_Symbol_1 = tully_ext, B_External_Symbol_1 = cicero_ext ; Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = C_External_Symbol_1, C_External_Symbol_1 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = B_Internal_Symbol_1, B_Internal_Symbol_1 = quine_tully_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int, External_Relation_Symbol_1 = denounced_ext, A_External_Symbol_1 = B_External_Symbol_1, B_External_Symbol_1 = tully_ext understands_external_and_understands_internal_object(Subject_1, Time_1, Subject_2, Time_2, 1, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_1, A_External_Symbol_1, B_External_Symbol_1, C_External_Symbol_1). false. understands_external_and_understands_internal_object(Subject_1, Time_1, Subject_2, Time_2, 2, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_1, A_External_Symbol_1, B_External_Symbol_1, C_External_Symbol_1). false. understands_external_and_understands_internal_object(Subject_1, Time_1, Subject_2, Time_2, 3, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_1, A_External_Symbol_1, B_External_Symbol_1, C_External_Symbol_1). false. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% understands_external_and_understands_external_object(Subject_1, Time_1, Subject_2, Time_2, 0, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_1, A_External_Symbol_1, B_External_Symbol_1, C_External_Symbol_1, A_External_Symbol_2, B_External_Symbol_2, C_External_Symbol_2). Subject_1 = quine, Time_1 = Time_2, Time_2 = now, Subject_2 = tom, Arity = 2, Relation = denounced, A_Object = B_Object, B_Object = cicero, C_Object = C_Internal_Symbol_1, C_Internal_Symbol_1 = C_Internal_Symbol_2, C_Internal_Symbol_2 = C_External_Symbol_1, C_External_Symbol_1 = C_External_Symbol_2, C_External_Symbol_2 = nop, Internal_Relation_Symbol_1 = quine_denounced_int, A_Internal_Symbol_1 = B_Internal_Symbol_1, B_Internal_Symbol_1 = quine_cicero_int, Internal_Relation_Symbol_2 = tom_denounced_int, A_Internal_Symbol_2 = B_Internal_Symbol_2, B_Internal_Symbol_2 = tom_cicero_int, External_Relation_Symbol_1 = denounced_ext, A_External_Symbol_1 = B_External_Symbol_1, B_External_Symbol_1 = A_External_Symbol_2, A_External_Symbol_2 = B_External_Symbol_2, B_External_Symbol_2 = cicero_ext understands_external_and_understands_external_object(Subject_1, Time_1, Subject_2, Time_2, 1, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_1, A_External_Symbol_1, B_External_Symbol_1, C_External_Symbol_1, A_External_Symbol_2, B_External_Symbol_2, C_External_Symbol_2). false. understands_external_and_understands_external_object(Subject_1, Time_1, Subject_2, Time_2, 2, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_1, A_External_Symbol_1, B_External_Symbol_1, C_External_Symbol_1, A_External_Symbol_2, B_External_Symbol_2, C_External_Symbol_2). false. understands_external_and_understands_external_object(Subject_1, Time_1, Subject_2, Time_2, 3, Arity, Relation, A_Object, B_Object, C_Object, Internal_Relation_Symbol_1, A_Internal_Symbol_1, B_Internal_Symbol_1, C_Internal_Symbol_1, Internal_Relation_Symbol_2, A_Internal_Symbol_2, B_Internal_Symbol_2, C_Internal_Symbol_2, External_Relation_Symbol_1, A_External_Symbol_1, B_External_Symbol_1, C_External_Symbol_1, A_External_Symbol_2, B_External_Symbol_2, C_External_Symbol_2). false. write_stats(Ignore). will be stats someday true. noprotocol.