### Questions (28)

 3 $((\neg q\;\text{if}\;r)\text{unless}\;s)$ OR $(\neg q)\;\text{if}\;(r\;\text{unless}\; s)$ 2 How Implication or Material/Concrete Conditional works when the antecedent is false and the consequent is true 2 $(r \wedge \neg s) \rightarrow \neg q$ 2 Why we require to study a specific type of relation called function? 1 Is it legal to subtract $1.\overline{9}$ - $0.\overline{9}$?

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 0 what does it mean to say that rational numbers are obtained “from unity”?

### Tags (20)

 0 logic × 11 0 terminology × 3 0 propositional-calculus × 9 0 solution-verification × 2 0 elementary-set-theory × 5 0 rational-functions × 2 0 discrete-mathematics × 4 0 rational-numbers × 2 0 relations × 4 0 polynomials × 2

### Bookmarks (13)

 15 How to tell whether two graphs are isomorphic? 2 How Implication or Material/Concrete Conditional works when the antecedent is false and the consequent is true 2 Why we require to study a specific type of relation called function? 2 $(r \wedge \neg s) \rightarrow \neg q$ 1 How can $P \lor Q,~ P \vdash \lnot Q$ be invalid?