I think that SAN is different. I roll my dice and call the result. If I pick them up before the other player has a chance to digest the situation, I have to call your SAN.
The other stuff is not dependent on the pips on my dice.
That being said, I don't A.2 to my opponents but never insist that my opponent allow me to go back in time and roll that forgotten weapon repair, etc. I almost always get what I give and we have a cordial game. The win at all costs ... we are not playing for grocery money. I prefer to win but my first preference is to contemplate the puzzle while having an interesting conversation with someone with whom I have shared interests. Some of my best games found me getting my clock cleaned and some of my least enjoyable games had me winning. Pleasure and victory do not have a 1:1 correlation, some correlation but not 1:1.
Same here, I'll call out stuff that's clearly in my best interest to ignore, if I'm aware my opponent forgot to repair his HMG that malf'd last turn, I'll point it out.
Something like that is a big deal to the outcome of the scenario, so I'd feel bad about letting it go by unnoticed. And if we both forgot then realized close enough to the end of the Rally Phase, I'll say roll for it.
Lord knows I've forgotten more than my share of repair rolls for SW mixed in stacks.
I don't play in tournaments, so it's strictly casual play, remembering the rules is part of the challenge, though I don't use that as a tool to win.
I always play to win (even against my son who's still a beginner, I just give him a lot of help/hints), but if it's been a fun game I'd assess that as a win for both players regardless of which side won.
If it comes down to the last player turn and it's still undecided you know you've both done your best, and that's all we can do.
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That said, everyone is different, just like there are fast players and slow players, so I guess it makes more sense to find players whose approach to a game is compatible.
In regards to actual cheating, it's probably pretty rare and definitely hard to be sure what the player's intent really is, unless it becomes obvious via repeat incidents of conveniently 'forgetting'.
I've only ever played one person who did cheat (though not ASL). Our group just stopped inviting him to games.
He's still my friend and now will admit it (it's been more than 30 years).