If the answer says “1. Quantly, 2. Acme, 3. Beacon”, Acme is in position 2. If the answer is a paragraph that names three brands, there is no position: turning the first name in a sentence into a ranking is inventing the data.

That is why an average position has to say how many answers with a list it was calculated on. “Average position 2.4 across 9 answers with a list, out of 22 valid” can be defended; “average position 2.4” on its own cannot.

Read: How to know if ChatGPT recommends your company.