And, or, in our certification

and

      A & B => C means,
      if both two info A and B is True, C is true

or

      A or B => C means,
      if one of two info A and B is True, C is true

Mr Shannon create 2 type electric circuit

   (1) and circuit
   (2) or circuit

with (1) (2), we can represent logical tie with electric circuit.