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

>>12
Development of communication technologies leads to a decline in average human intelligence. For proof just go on Facereddit (or here). Also ask an average postmodern Internet dweller to read some Shakespeare or Dumas - chances are, he/she won't even be able to comprehend it.

I do not need or care to provide you any more "logical arguments" for obvious things such as these, sorry.