"If p, then q" = "q unless ~p"?
130028
Why is a statement "vacuously true" if the hypothesis is false, or not satisfied?
111575
What does this if-then statement mean?
44975
Or operand with int in if statement
90219
Less than or equal to
72136
Why is my use of the ?: conditional operator incorrect?
38958
How do "and" and "or" act with non-boolean values?
101846
commath and \ifinner
23849
Test condition in if command
48614
Why is "$P \Rightarrow Q$" equivalent to "$\neg Q \Rightarrow \neg P$"?
43219
If $[K(\alpha):K]=p\neq q=[K(\beta):K]$ then $[K(\alpha+\beta):K]=pq$
119353
'If' statement and the colon
79407
How to solve ~(P → Q) : P & ~Q by natural deduction?
149631
Math-like chaining of the comparison operator - as in, "if ( (5<j<=1) )"
123682
Can I use an "if" clause without "then"?
32180
Why is "$A$ unless $B$" equivalent to $A \lor B$?
78285
How to check for equals? (0 == i) or (i == 0)
121375
Is it safe to temporarily redefine \and, \or, and \not?