Not every post i make has to be constructive. thats pretty unfair.
One of my old jobs was teaching English as a foreign language in Japan. It was difficult to explain words to low level students without using other words they may not understand. So answering "how do i render a transparent scene?" with "yadda yadda alpha channel." is perhaps not as constructive as you think it is.

i find this thread annoying because of what you mentioned but also because of the content. These are some incredibly basic questions here and to finish it off with "i need to know fast" is a bit cheeky. no explanation or anything. What could you possibly be doing that you need to know so fast? Also, the questions are pretty basic i'd be surprised if you couldn't get the answer from google, or even the search function on the site.