If I successfully "cheat" on a workout .... what is my RPE?

I would call it a fail if it was me, so I would mark it as “All Out”. If it’s too hard to complete as assigned, then I don’t feel I completed the workout. Having said that, I don’t see that as a negative. I see it as a way to tell the AI that I can’t complete the workout as written, so it needs to give me an “easier (but probably still really hard)” workout next time. By marking it lower and saying I “passed”, I assume it’s going to give me an equally difficult or even harder workout next time, which is unproductive.