@Frank Apisa,
Quote: "Reasonable uncertainty" can mean vastly different, and irreconcilable, things to different people.
By that I basically mean: a belief in one's mind ("thoughts happen within some mental space"); a belief in an objective world "out there"; the belief in objects ("the world can meaningfully be conceptualized as made of pieces"); the belief that our senses do not "lie" to us too much (not that they are exact and accurate, but "close enough to be functional in most situations"); the belief in something called time, which flows irreversibly; the belief in logic as a useful, indeed generally very reliable thinking tool... That may suffice. :-)
Quote: Is there a life before or after the life you appear to be living right now?
Are you talking about death?
"Before or after" implies evidently that our present life has a start and an end. Hence it assumes a belief in time (listed above as reasonable) and in our death. We all know, even those who pretend not to know anything... We all without exception will die, including all animals beyond a certain threshold of complexity (from the flat worms up or something like that, i.e. 99% of all animal species).
What other assumption do you make by asking yhis question? That your mind exists and is tied to a material body. Reasonable. What become of the mind once the body dies? It dies too, with the body that supports and creates it. Minds cannot exist without brains, or why would our body bother fabricating anf nourishing this brain? About one third of our energy goes to our brain on average, I think. Or maybe a quarter, but a big deal of it. A human brain is a high-cost, high-maintenance device. Very mysterious too, but there is little doubt that it creates or supports the mind.