Not a single data point. First principles and logical analysis.

Let me put it more simply:

Did hunter-gatherer societies invent more artifacts that survived until today or did agricultural societies? This is an objectively quantifiable actuality we could check.

Which societies that we know about today had developed writing surfaces that persist until today? This is something we can check.

Be reasonable. Clearly, based on everything we know today, we're talking about agricultural societies here, not hunter-gatherer societies.