11 letters · 15 points in Scrabble
noun a message expressing an opinion based on incomplete evidence
noun a hypothesis that is taken for granted
noun the cognitive process of supposing
originFrom Middle English supposicioun, from Anglo-Norman supposicion, from Latin suppositiō, suppositiōnem (“supposition”), from sub- (“under”) + positiō, positiōnem (“position; theme”), from positus (“position”), from the perfect passive participle of pōnō, pōnere (“put, place”).
Etymology from Wiktionary, CC BY-SA 3.0