What experiences have you had that you think correspond with enlightenment? Do you mean the apparent momentary cessation of consciousness?

That specifically, yes. The one instance that I specifically remember involved an apparent momentary cessation of consciousness, blanking of my entire working memory, and an intuition that 'I' was not necessarily the same person who'd been running this body five minutes prior. I imagine that if I hadn't already spent some time thinking about personhood and identity, I would have been quite floored by it, which would have been quite inconvenient as I was in the middle of a task at work at the time.

That general class of experience - periods where I experience oddities of working memory and general mental function followed by an intuition that something has changed, possibly with a cessation of consciousness that I simply miss most of the time - is not unusual enough to be noteworthy; I estimate that it's happened at least once a year for the last 4 or 5 years, and possibly prior to that as well. The most recent one was less than two months ago, in fact - I remember because there was some specific food item I'd been waiting for Alicorn to get around to making before it happened, and then after it happened I didn't want that food item any more and mentioned that to her. (I don't remember a cessation of consciousness with that one, but it could easily have happened in such a way that I simply missed noting it.)

In what way do you think your normal experience is like my description of stage four (or mode four perception)?

My normal mode involves a fairly wide field of perception - it's not unusual for me to notice things that are near the edge of my visual field when I'm 'focusing on' something in the center of it, for example, and I can focus on multiple modes of perception well enough to 'transcribe' the visual synesthesia that I experience with music in realtime, though that takes considerable effort (probably mostly because I don't have much practice in general with drawing). Most concepts don't evoke emotional responses in me, which actually gets me in trouble sometimes when I forget that other people do have particular, involuntary emotional responses to certain words and concepts. Monitoring what my mind is doing is not any harder than reading text or listening to music; it's actually easier than reading a challenging text. Such observation is nuanced well past the point that I can easily communicate with words - for example, the idea that anger and frustration are versions of the same thing seems downright silly, and each of those has at least half a dozen different subtypes that function slightly differently from each other. ("I want to punch you in the face" is not the same as "I want to destroy your reputation" is not the same as "I want to do a better job than you at something you think you're good at so that you know I'm superior to you" is not the same as "I want to make you cease to exist", and each of those is related to a different kind of anger, for example, though anger varies along more than that one dimension.) The fact that my mind is mostly made up of basically-automatic subsystems is obvious to me because I can 'see' several of them, and divine the workings of several more, and I've been known to be able to consciously tweak the workings of those systems in limited ways.

I could probably go on a bit, but it's mostly stuff like that; I think you get the general idea.

I may have more things I'd like to ask you after you respond, if you don't mind.

Sure, go ahead.

(Note: I know my 'tone of voice' is odd above. This is a thing that happens when I'm talking directly to someone I don't know well. I haven't yet found a good workaround that doesn't involve getting to know the person. I can only directly tweak some things about how my automatic systems work. ;P )