What primary issue complicates identifying the very first human invention?

Answer

The definition of "invention" itself (physical tool, fire control, or cognitive system).

The search for the first invention is complicated because the definition chosen drastically alters the candidates considered, requiring differentiation between physical objects (tools), manipulation of natural resources (fire), and cognitive constructs (language or social rules).

What primary issue complicates identifying the very first human invention?

#Videos

15 Early Inventions ahead of their time - YouTube

inventionfirsttool