Word: fact

n

• a concept whose truth can be proved; "scientific hypotheses are not facts"
• a piece of information about circumstances that exist or events that have occurred; "first you must collect all the facts of the case"
• a statement or assertion of verified information about something that is the case or has happened; "he supported his argument with an impressive array of facts"
• an event known to have happened or something known to have existed; "your fears have no basis in fact"; "how much of the story is fact and how much fiction is hard to tell"

PROTOTYPE PAGE, Source: WordNet