What is the word for a person who thinks there is always a simple solution to any given problem?
I have heard this term used before in an intellectual debate in the past, but cannot remember what it is.
The word itself may not have been used to actually refer to a type of person, but to the belief itself (I don't remember this detail either). It also may have been a noun or an adjective (probably a noun, imo), for all I remember.
Addendum 1: in the debate, the belief (or the person holding the belief) was presented as silly, a bit irrational, unrealistic
Addendum 2: the problems the debate was focused on primarily were more down-to-earth in their nature, though global problems were not excluded per se.