Claim: Socrates passed away in 399 BC.
Evidence: Socrates -LRB- -LSB- ˈsɒkrətiːz -RSB- Σωκράτης -LSB- - grcsɔːkrátɛːs -RSB- , Sōkrátēs ; 470/469 -- 399 BC -RRB- was a classical Greek -LRB- Athenian -RRB- philosopher credited as one of the founders of Western philosophy.