⊙ is a logical operator. ⊙ means XOR operation, that is, when the values of two input variables are the same, F= 1.

The symbol of the same or is ⊙ (the point in the circle), and its algorithm is a⊙b=ab+a'b'(a' is not A, B' is not B).

True identical or false result is false, false identical or true result is false, true identical or true result is true, false identical or false result is true. That is, if the two values are the same, the result of XOR is true. On the contrary, it is false. -referred to as the same truth, different false. That is, the same or: the same is one and the difference is zero.