text: Life without numbers in a unique Amazon tribe 11=2. Mathematics doesn #39;t get any more basic than this, but even 11 would stump the brightest minds among the Piraha tribe of the Amazon. 
inputs: Life without numbers in a unique Amazon tribe 11=2. Mathematics doesn #39;t get any more basic than this, but even 11 would stump the brightest minds among the Piraha tribe of the Amazon. 