"If... then" equivalence
48614
Why is "$P \Rightarrow Q$" equivalent to "$\neg Q \Rightarrow \neg P$"?
36544
"If" and "Whether" - Is interrogative IF always replacable by WHETHER?
52403
Need help understanding phrases of the form "x if y"
150297
One-liner if statements, how to convert this if-else-statement
148617
If something was vs If something were
140931
What is the difference between if(!!condition) and if(condition)
149631
Math-like chaining of the comparison operator - as in, "if ( (5<j<=1) )"
41517
First conditional with "would" instead of "will"
16124
Use of "If there is/are"
87928
Proof of logical equivalence of biconditional and other proposition
154711
Is there a difference between Therefor and Therefore?
151382
What does "if not" mean in the given sentence
25997
Conditions Equivalent to Injectivity
894
Analogy: "as if" vs. "as though"
155592
Conditional conundrum
48213
proving logical equivalence $(P \leftrightarrow Q) \equiv (P \wedge Q) \vee (\neg P \wedge \neg Q)$
53612
Same solution implying row equivalence?