A: I'm tempted to say 'ask someone else', since I think I'm not in the position to answer, but let this be the last post of mine on this thread for the day. I think there is some sort of method (understandable, yes, but only if you try really hard, in some cases: it might be so distant from yours that you just can't comprehend at first) to people's actions. There's two versions: some are consistent with an idea, some are consistent with themselves. Those who are consistent with an idea - needs not to be anything metaphysical or even complex, just any idea, including, say, "i want to record an album and tour" or "i want to make friends" - are conscious of what drives them, so it's easy to decipher: ask. Those who are acting spontaneously, as in "not following a goal and a sequence of moves that leads them to reach it", are of course completely conditioned by their basic behavioral traits, and it might be really hard to understand how those work. Finally, most people are a combination of the two, depending on the part of life you're looking at.
Q: And when they know, how often do they lie upon being asked why?