Is the following reasoning right?
3955
Square roots -- positive and negative
109685
An invalid argument, the conclusion of which is a tautology
129784
Is it right to use a singular form of the verb in this sentence?
117261
What is the correct word order in this sentence?
158016
Help understanding predicate logic question/proof
34717
'reason' vs 'reason that'
77255
Is the sentence structure "because... and so" grammatically correct?
143248
What approach should I take to establish this logical proof?
32744
A clarification in a limit
130722
Can you prove this property?
950
Doubts on the axiom of union?
53101
Is it true that the relation |A| < |B| is a sufficient condition for claiming that $f$ is a bijection?
131792
Questions about right ideals
74060
Is "You are correct" correct?
79686
How can I prove these statements?
26440
Is my argument against Descartes's "I think, therefore I am", logically sound?
10444
If $\{x,\{x,y\}\} = \{z, \{z,t\}\}$, then must it be $x = z$ and $y = t$?