The conditions of 47E1 are such that if discovered prior to agreeing the score, the card is removed from the errant trick without further rectification (no provision for canceling play subsequent the induced card that was removed). Such errant trick would have the characteristics of being defective. Presumably, the removal of the card creates the defective trick infraction (no card contributed to the trick) which has its own remedy. Notably, justice requires that an induced play should endow the player the entitlement to insist without penalty it stand, or retract, so long as the partner has not subsequently acted.