Comment by ArkhamMirror

The ACH method actively encourages you to start off with any and all plausible explanations and eliminate them as you go along, but the AI suggestions are definitely more limited than what a human could come up with.

There are LLM limitations on the call to generate hypotheses to return them in a certain format and to return a certain number of them, and that sort of thing, so it's usually in your best interest to use the LLM as more of an assistant to check if you missed anything or for a push to get started looking in different directions more than having the AI doing the whole thing (although if you are being lazy or don't know what to do, you could let the LLM do pretty much everything - I pretty much let the LLM handle everything it could in testing.)