<p>I generally agree with @Tim's answer, but I'd like to make a few other points. </p>

<p>1) As noted by @amoeba, consent is really important. I can't emphasize this enough. I have tons of <em>opinions</em> about statistics that aren't well developed enough to be taught to the world / are probably wrong. I'd hate for someone to take some of my opinions and present them as facts. </p>

<p>2) Given that the other party has consented, it's still important to back up the claims with explanations and supporting material. The last thing crossvalidated needs is "PCA is better than factor analysis. Trust me, Obama told me so". </p>

<p>3) Finally, if someone gives you a solution but would prefer to stay anonymous, I don't see anything wrong with posting it as a solution. If you want to be humble, you could mention "a colleague mentioned solution X". </p>
