The church does lie, as it tells people xyz will happen when they die, and they tell it as fact.
It's okay to guess however, but the church doesn't tell it's listeners it's just wildly guessing, it's falsely presented as fact.
Nobody knows what happens when we die.
Nobody.
Anyone or anything that claims "they/it knows" is lying and should be ignored.
But we could speculate. For example, is the state of non-being that preceded our birth (or the state before we became conscious) is the same state that might expect us after we cease to be? Is either of these states (or, rather, non-states) is somehow similar to a state of deep sleep, or any other state that involves complete unconsciousness, for that matter?
Yeah we can speculate, that's all we can do. I guess everyone has done that, maybe even animals do?