Pattern matching has a definition in this field, it does mean specific things. We know machine learning has excelled at this in greater and greater capacities over the last decade
The other part of this is weighted filtering given a set of rules, which is a simple analogy to how AlphaGo did its thing.
Dismissing all this as vague is effectively doing the same thing as you are saying others do.
This technology has limits and despite what Altman says, we do know this, and we are exploring them, but it’s within its own confines. They’re fundamentally wholly understandable systems that work on a consistent level in terms of the how they do what they do (that is separate from the actual produced output)
I think reasoning, as any layman would use the term, is not accurate to what these systems do.