I've read answers that were direct quotes from books, I know this for I read the same books, there mostly from senior status people, perhaps well read on the subject, but with little or no actual experience.
That's what I meant by getting supporting evidence from other information sources.
Everybody can quote from an article or a book, without really understanding how to make actual use of the content.
Valuable posts take a piece of knowledge and transform it into something useful 'in real life', i.e. something that will improve a reader's understanding of the market, or supply a trade idea.
One can read in a hundred trading books that Support and Resistance aren't fixed lines, but should rather be viewed as floating zones defining supply and demand.
That piece of info in itself is useless to a new trader.
A good post will explain that these are 'kill zones' artificially created by the big players (banks and institutions) for the sole purpose of shafting retail traders. It will proceed by formulating this into a trade approach: 'Look at a chart, observe the price movement, and ask yourself how the biggies would have to act to hurt the maximum number of small traders in a given situation ... then act as they (the banks) would'
That is just a (very abbreviated) example, of course, but the idea behind it is valid, and actually quite valuable. A trader who has already gained some experience will be able to make use of it, should this basic approach never have occured to him/her before.
A very new trader will require a more extensive explanation, ideally backed up by some actual examples.