Related Clues:

• Had all the answers
• Had down pat
• Was certain of
• Apprehended
• Had met before
• Was acquainted with
• Appreciated
• Was privy to
• "... Yorick! I __ him, Horatio": Hamlet
• Was certain
• ''I ___ it!''
• Had no doubt
• "Who __?"
• Felt in one's bones
• Had more than a gut feeling