They are preflop. Such as a higher pair vs a lower pair. The higher pair will win approximately 80% of the time if AIPF. Just as a dominated hand will only win approximately 25% of the time (AQ vs AK example). That is if you went allin preflop 100 times with AK against AQ you should expect to win ~75 times. Precentages obviously change on the flop,turn,river depending on the boards and how the hands connected with the board.