- 6 A Let L Be A Logical Language And Let Cn A A A Fa Be The Consequence Closure Of A Cl Where Is The Classical 1 (46.9 KiB) Viewed 27 times
6. = a. Let L be a logical language and let Cn(A) = {a | A Fa} be the consequence closure of A CL where is the classical
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6. = a. Let L be a logical language and let Cn(A) = {a | A Fa} be the consequence closure of A CL where is the classical
6. = a. Let L be a logical language and let Cn(A) = {a | A Fa} be the consequence closure of A CL where is the classical consequence relation. For each question, if the answer is yes, then give a proof, otherwise give a counterexample. i. If A, C A, holds, does Cn(41) Cn(42) hold? [4 marks) ii. If A has no models, does Cn(A) = L hold? (4 marks) iii. Does Cn(A1) U Cn(42) = Cn(A, UA2) hold? [4 marks)
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