Show that the argument is valid, indicating the rule of inference or logical equivalence applicable to each step. ∃x ( C(x) ∧ ( ¬ S(x) → ( V(x) ∨ W(x) ) ) ) ∀x ( V(x) → ¬ C(x) ) ¬ ∃x ( W(x) ∧ C(x) ) _________________________ ∴ ∃x ( S(x) ∧ ¬ W(x) )
Show that the argument is valid, indicating the rule of inference or logical equivalence applicable to each step. ∃x ( C(x) ∧ ( ¬ S(x) → ( V(x) ∨ W(x) ) ) ) ∀x ( V(x) → ¬ C(x) ) ¬ ∃x ( W(x) ∧ C(x) ) _________________________ ∴ ∃x ( S(x) ∧ ¬ W(x) )
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Show that the argument is valid, indicating the rule of inference or logical equivalence applicable to each step.
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