In Deductio each player has a card with numbers from 1 to 20. On your turn, you will either take one clue card that truthfully describes your Secret Number (for example saying that you don’t have a number from 1 to 5) or you can try to guess other players' Secret Number. A correct guess will award you with a point, and a wrong will force you to take two clue cards helping others deduce your Secret number.