A Boolean operator $\ominus$ is defined as follows:
1 $\ominus$ 1 =1, 1 $\ominus$ 0 = 0, 0 $\ominus$ 1 = 0 and 0 $\ominus$ 0 =1
What will be the truth value of the expression (x $\ominus$ y ) $\ominus$ z = x $\ominus$ (y $\ominus$ z)?
- Always true
- Always false
- Sometimes true
- True when x,y, z are all true