Hi Jacob —
It’s an interesting question — I can’t remember seeing an LSAT problem where a vague or easy-to-misinterpret usage of “almost” impacted the reasoning, so I’m afraid I can’t give you a worthwhile response on this — I would define almost as nearly all but not all, but, again, that’s just off the cuff — if anyone else has any thoughts please chime in, and if you happen to find the q I’d be happy to give my thoughts on it —
Mike