Question

Show that every wf part of a wff $\sim \mathbf{B}$ or $\forall \mathbf{x}$ B is either the entire wff or a wf part of $\mathbf{B}$.

   Show that every wf part of a wff $\sim \mathbf{B}$ or $\forall \mathbf{x}$ B is either the entire wff or a wf part of $\mathbf{B}$.

An Introduction to Mathematical Logic and Type Theory: To Truth Through Proof (Computer Science & Applied Mathematics)

An Introduction to Mathematical Logic and Type Theory: To Truth Through Proof (Computer Science & Applied Mathematics)

Peter B. Andrews 1st Edition

Chapter 2, Problem 7

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Step 1

A "wff" stands for "well-formed formula" in logic, which is a syntactically correct arrangement of symbols adhering to the rules of the logical language. A "wf part" of a wff is a substring of the wff that is itself a well-formed formula. Show more…

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Show that every wf part of a wff $\sim \mathbf{B}$ or $\forall \mathbf{x}$ B is either the entire wff or a wf part of $\mathbf{B}$.

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