well, let's read the Set Builder
the variable "x", where "x" is greater than or equals to 2
Oh by the way "x" is also less than or equals to 2
hmmm what the heck? how can "x" be greater than 2 and at the same time be less than 2? well, that's kinda like a logical collision, so we can conclude that "x" is neither less than or greater than 2, but another condition is that it could be equal to 2, since the other two collided, the only conclusion is that "x" must be equal to 2.