The article mentions one such tool - needles with eyes. As this innovation is mentioned, I imagine the time of its invention is consistent with the hypothesis.

The article mentions one such tool - needles with eyes. As this innovation is mentioned, I imagine the time of its invention is consistent with the hypothesis. Do you have in mind specific tools from before 70kya that seem to require recursive thinking? I am not sure what would constitute recursion in tools - maybe something like an atlatl, sling or bow, where a tool is applied to another tool? These particular examples do not seem to challenge the timing of the hypothesis.