This is one of the core principles of How To Win Friends And Influence People (Dale Carnegie). Since Ive read I tried to apply this rule. It works.

That's true, and avoiding (direct) argument may well be the #1 takeaway in How to Win Friends And Influence People.

I read it in my early 20s and at that time my main takeaway, as I recall, was to (paraphrasing), "carefully plant the evidence, thus making the conclusion something the audience comes to on their own (they 'think of it' themselves)".

In entrepreneurship, this was slightly dangerous to me, since I immediately started implementing this successfully. Before long, I (apparently) took "credit" for "my idea" (that I successfully got the audience to see, oh so carefully), whereas audience thought that we "came up with it together"!

Oy vey! So, a word to the wise. I now subscribe to more of a "plain honesty but with tact" approach.