Asking those kinds of questions are heavily frowned upon here as we already have the almighty Googlez. Questions in bitcointalk are for things that you couldn't easily find out by doing a google search.
Yeah, but with an evolving technology like Bitcoin there's quite a bit of information which is out of date, and misleading, and that's exactly why a forum is useful for ongoing discussion.
Sure yeah. It completely depends on the question though. About learning about blockchain though? I'm pretty sure majority of the content out there are still decently dated. Also, while doing proper research you should also take into consideration the date of the article you're reading in the first place.