What language cavemen could program in?

C/C++ syntax is quite unforgiving for mistakes, and cavemen weren't good abstract thinkers.
I think something like a variant of LISP or Forth could be used to teach a cavemen basic programming.
Haskell or restricted subset of it, would look like pseudocode and could be more palatable to primitive cavemen

>>21
Communication technologies have made modern men orthographically and philologically undeveloped. And since language is inextricably linked to thinking, the linguistic degradation has caused a decline in intelligence, as well. The ancient writers could not only construct phrases and sentences sprawling with complexity and logical precision, they (and their readers) could think thoughts of corresponding precise delicacy. Not so in the modern days of Instagram and that epitome of cerebral degeneration, Twitter.