"okay I am confused. you say evolution do explain the origin of thought; @Coded Logic say evolution should not explain the origin of thought and wikipedia treat it as an unsolved problem." - Hot.
Evolutionary theory does explain the origin of thought. We all share a common ancestor and over time what we describe as 'thought' has evolved to what we see today. Remember what a scientific theory is and what it is not...
Evolutionary theory does not have to explain the origin of thought. The theory works anyway, even if we don't know everything yet.
The origin of thought has not yet been solved...
All 3 are accurate statements.
"Perhaps you too should write to wikipedia and provide your solution for how thought evolved?" - Hot.
Perhaps you should try to understand what a scientific theory is...