You can also wait for them to repeat themselves and will often find that their idea of 'repeating' is to say something substantially, meaningfully different.

Then you just ask them to basically pick a lane, settle on one actual thing they are trying to ask, and they will often get frustrsted by the idea of having to form and settle on a single, actually coherent thought, and abandon the attempt.

Or, get very angry.

In either scenario, if either of those happen, its now clear you are dealing with either a dumbass or an emotionally unstable / heightened emotional state person, which is useful information to have for formulating your actual response.