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Let the following be premises: * C- A * - A * -C - - B - Dv B

Let the following be premises: * C- A * - A * -C - - B - Dv B

Database System Concepts
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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Let the following be premises: * C - A * - A * ¬ C – - B * - Dv B Number the statements below in such a way that each follows from the premises together with previously derived statements, as you would when doing natural deduction. Use only modus ponens as your rule of inference, potentially after converting ORs into implications and implications into their contrapositives (you do not need to record this step). For example, if you had premises p, p → q, q→ r, then you would first derive q (label it 1), then after that deriver (label it 2). - C - D - B > >
Transcribed Image Text:Let the following be premises: * C - A * - A * ¬ C – - B * - Dv B Number the statements below in such a way that each follows from the premises together with previously derived statements, as you would when doing natural deduction. Use only modus ponens as your rule of inference, potentially after converting ORs into implications and implications into their contrapositives (you do not need to record this step). For example, if you had premises p, p → q, q→ r, then you would first derive q (label it 1), then after that deriver (label it 2). - C - D - B > >
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Given premises:

 

C→A¬ A¬ C→ ¬ B¬ D∨B

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