Why not add something to both sides of a purported identity to prove it?
41943
Why is it that when proving trig identities, one must work both sides independently?
79832
Why are there gaps in my IDENTITY column values?
143318
Is it possible to accept the alternative hypothesis?
38540
Wouldn't it make sense to have more than one answer acceptable?
120140
What to do with an additional answer which IMHO explains only a small portion of the question, while another answer explains more
133194
Can we prove reality?
57105
Probs. 12 & 13 , Sec. 2.3, in Herstein's TOPICS IN ALGEBRA, 2nd ed: Existence of only right-sided identity and right-sided inverses suffice
148502
Two accepted answers
24316
Usernames vs. Real Names
125263
How to crack the proof
62695
Is this character being impersonated?
147490
If matrix $AB=A$, does it mean B must be an identity matrix?
8201
Two "offtopic" flag reasons
142040
Is Using Digital Signatures to prove identity a zero knowledge proof?
75643
How to handle people impersonating other people by choosing the same display name
147874
Why does the existence of independent statements not prove consistency?
100399
A doubt with a part of a certain proof.