logic – Is there any use in bivalent variables in computer science?

Is there any use in bivalent variables in computer science? By bivalent variable, I mean any variable that has 2 values at the same time as in:

x = 2 and x = 4

x has both the values of 2 and 4 at the same time regardless of the value of y or the value of any other variable.

Is there any use in such a concept?