a problem in justifying ONLY IF truth table
15504
In classical logic, why is $(p\Rightarrow q)$ True if $p$ is False and $q$ is True?
14236
Why is this clause unsatisfiable?
85559
Full Justification in ttfamily
12186
How does predicate logic handle contradictory statements about something that does not exist?
52585
How to prove that $[(p \to q) \land (q \to r)] \to (p \to r)$ is a tautology without using the truth table?
149643
Stuck on validation of argument using rules of inference
113605
In Fitch, how does one prove "(P → Q)" from the premise "(¬P ∨ Q)"?
72034
Truth table and the meaning of $\oplus$ in propositional logic
142026
Show that $A∩B∩C= ∅$ is only true when $A∩B = ∅, A∩C = ∅$ or $B∩C = ∅$ or show a counterexample.
32009
Prove $\;\big((p\rightarrow q) \lor (p \rightarrow r)\big) \rightarrow (q\lor r)\equiv p \lor q \lor r$ without use of a truth table.
155884
What are the conditions on $\text{tr}(AB) \leq \text{tr(A)} \text{tr(B)}$ to be true?
52322
Implication in mathematics - How can A imply B when A is False?
153440
Is logical implication always determinable from just the given statements?
113957
Why is it possible to conclude everything from a false statement?
77332
Extremely difficult logic question using conditional statement
3663
Finding counterexamples in elementary set theory.
133598
Instruct a Table to only evaluate until a condition is fulfilled