I’m not sure I see a real difference between evasion and failing to seek facts one suspects are relevant. In Atlas, Rand described evasion as “the act of unfocusing your mind and inducing an inner fog to escape the responsibility of judgment.” I think the basic question here is: How active does this have to be in order to legitimately be called evasion?
I would relate the basic psychological process to how it feels to edit an article. I’m reading along, and everything is flowing smoothly, but then I read something and get a vague, uneasy feeling. I’m not really sure why. I face a choice. (1) I can acknowledge the feeling and ask what caused it: Is there a problem with the text, or did I misread it, or do I need to expand my vocabulary? Or (2), I can ignore this feeling, which is effectively a “hunch” or “clue” that—if I am to remain in full-focused awareness—something requires investigation, and keep on reading. I think this is basically how most people experience the need to increase their awareness, and then they either do increase it, or ignore the feeling and fail to ask the requisite questions—even though they do suspect that they are on shaky ground in doing so.
