[wzdd]

It's not that interesting a question and is really just a language issue.

Formally, reasoning is about a rational process of deduction through which a conclusion is drawn from a set of information. Informally, reasoning is 'that thing humans do when they think'. By the first definition, GPT4 is pretty obviously capable of reasoning, as is as lot of other things, such as Prolog or a cat. By the second, it's not and won't be until you can e.g. hire it as a PA or trust it to look after your kids for the day.

It's only coming up because what GPT4 does is the closest thing to the informal definition we've yet seen.