I have some doubts with first order logic
121720
Given ∃x.¬p(x), use the Fitch System to prove ¬∀x.p(x).
29110
Propositional Intuitionistic Logic Question
15504
In classical logic, why is $(p\Rightarrow q)$ True if $p$ is False and $q$ is True?
1027
Why is this true? $(\exists x)(P(x) \Rightarrow (\forall y) P(y))$
151038
How to prove (A v B), (A → C), (B → D) therefore (C v D)
21035
Clarifying on how if p,q is logically equivalent to p only if q
13064
In what order are chained implications evaluated? (i.e. $a \implies b \implies c$)
107290
proof of product rule of derivatives using first principle?
35370
Why is this proposition provable and its converse not?
57672
Trying to get all this terminology straight in logic
53199
First-Order Logic: Formalisation of the phrase "Not all that glitters is gold"
52938
Reference request: Standard textbook for first-order predicate logic in english
138632
Proof that if $a > 0$, then $\frac{1}{a} > 0$ using just field and order axioms
75381
How can we reason about "if P then Q" or "P only if Q" statements in propositional logic?
23873
"Firstly" or "first"?
2689
zero conditional and first conditional
18407
Must "first" be followed by "second"?