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1. If it does not rain, or it is not foggy, then the sailing race will be held and the lifesaving demonstration will go on. 2. If the sailing race is held, then the trophy will be awarded. 3. The trophy was not awarded. Show that it rained. Symbolically represent the propositions as follows: r. f: S: d: t: It rained. It was foggy. The sailing race was held. Lifesaving demonstration went on. Trophy was awarded. Then we have:

1. If it does not rain, or it is not foggy, then the sailing race will be held and the lifesaving demonstration will go on. 2. If the sailing race is held, then the trophy will be awarded. 3. The trophy was not awarded. Show that it rained. Symbolically represent the propositions as follows: r. f: S: d: t: It rained. It was foggy. The sailing race was held. Lifesaving demonstration went on. Trophy was awarded. Then we have:

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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Discrete mathematics Inference In the example picture I provide, accepting the promises , it suffices show r is one line and it show (e.x premise 3). Follow the example. Use the same format. THANKS!
Inference Accept the following Premises 1. 2. If fish can fly, birds can Swim If birds can swim, squirrels can talk If birds can swim and squirrels can talk, capybaras can write. 3. If 4. Fish can fly Show, using the rules of inference, that capybaras can write
Transcribed Image Text:Inference Accept the following Premises 1. 2. If fish can fly, birds can Swim If birds can swim, squirrels can talk If birds can swim and squirrels can talk, capybaras can write. 3. If 4. Fish can fly Show, using the rules of inference, that capybaras can write
Accepting the following premises: 1. If it does not rain, or it is not foggy, then the sailing race will be held and the lifesaving demonstration will go on. 2. If the sailing race is held, then the trophy will be awarded. 3. The trophy was not awarded. Show that it rained. Symbolically represent the propositions as follows: r. f: S: d: t: It rained. It was foggy. The sailing race was held. Lifesaving demonstration went on. Trophy was awarded. Then we have: 1. (r Vf) → (s Ad) 2. st 3. t Accepting the premises, it suffices to show r. And we have r as desired. 4. nt 18 (s^ d) (vf) fרר r Aרר & : r^f r Premise 3 Modus tollens, Premise 2 Domination Modus tollens, Premise 1 De Morgan's Double negation Conjunctive simplification
Transcribed Image Text:Accepting the following premises: 1. If it does not rain, or it is not foggy, then the sailing race will be held and the lifesaving demonstration will go on. 2. If the sailing race is held, then the trophy will be awarded. 3. The trophy was not awarded. Show that it rained. Symbolically represent the propositions as follows: r. f: S: d: t: It rained. It was foggy. The sailing race was held. Lifesaving demonstration went on. Trophy was awarded. Then we have: 1. (r Vf) → (s Ad) 2. st 3. t Accepting the premises, it suffices to show r. And we have r as desired. 4. nt 18 (s^ d) (vf) fרר r Aרר & : r^f r Premise 3 Modus tollens, Premise 2 Domination Modus tollens, Premise 1 De Morgan's Double negation Conjunctive simplification
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