Sterchak was a male Vulcan who lived in the 21st century. He was a Professor of philosophy and belonged to a minor branch of Vulcan philosophy. Sterchak's principle states that "any complex phenomenon that occurs only once indicates a high probability of sentient life".
In 2371, Jadzia Dax mentioned Sterchak to Honored Professor T'Kreng, although T'Kreng believed Sterchak's principle was "merely a guide to logical inference, not a fundamental law of nature". (DS9 - Invasion! novel: Time's Enemy)