This is done by placing one or more cards, ostensibly of a stated value, on the discard pile, while others are allowed to challenge the correctness of the player's statement about the cards being played.
This is done by placing one or more cards on the discard pile. This was ostensibly of a stated value. Others are allowed to challenge the correctness of the player's statement about the cards. This was ostensibly of a stated value. These cards are being played.