@ep1 @lain your point of how do you actually trust it to say you're learning anything good is valid point. i think my position is that until you're somewhat deep in a subject it's hard to know how to even ask questions and engaging experts skips over that difficult step. its hard to get experts to talk to you because they are busy people. but a proven way to get an answer to a question is to make them mad enough to correct you. something similar to this has been observed in internet help forums. if you ask a question nobody helps you but if you say "this tool sucks it can't even do xyz right" then someone pops up and says "you're an idiot here's how you do it." i have tested this maybe over a thousand times in my life and it really works.