Arduino.h always defines true and false, the trouble occurs when you use C, and include stdbool.h. Arduino.h should simply include stdbool.h instead of defining these for C code, and only define them ...

The purpose of this module is to display an algebraic equation on an 16x2 LCD screen and two players must vote if the expression is true or false. Each player will have two velostat pads (or buttons), ...

0x01 = True 0x02 = False: Start Sampling. This starts the detection of the button press. See Note 1 above for guidelines on usage. Will return success of starting sampling. 0x02: 0x01 = True 0x02 = ...

The boolean access is set to false and is used to store the value true or false when we read the tags (or cards). If you go to line 63 you can see a for loop where we check to see if the values we ...