Knowledge and the known

Kaarlo Jaakko Juhani Hintikka (; Finnish: [ˈhintikːɑ]; 12 January 1929 – 12 August 2015) was a Finnish and American philosopher and logician. Hintikka is regarded as the founder of formal epistemic logic and of game semantics for logic. He was awarded the Rolf Schock Prize for philosophy in 2005, and he was chief editor of the philosophical journal Synthese 1965–2002.