WORD OF WISDOM

SIMPLE - : free from guile : innocent2 a: free from vanity : modest b: free from ostentation or display 3: of humble origin or modest position 4 a: lacking in knowledge or expertise b (1): stupid (2): mentally retarded c: not socially or culturally sophisticated : naive; also : credulous5 a: sheer, unmixed d: constituting a basic element : fundamental 8: not limited or restricted : unconditional 9: readily understood or performed
synonyms simple, foolish, silly, fatuous, asinine mean actually or apparently deficient in intelligence. simple implies a degree of intelligence inadequate to cope with anything complex or involving mental effort. foolish implies the character of being or seeming unable to use judgment, discretion, or good sense.silly suggests failure to act as a rational being especially by ridiculous behavior. fatuous implies foolishness, inanity, and disregard of reality. asinine suggests utter and contemptible failure to use normal rationality or perception.

Merriam-Webster's Online Dictionay
http://mw1.merriam-webster.com/dictionary/simple