What Is The Principle Of Transitivity Of Identity?

What Is The Principle Of Transitivity Of Identity? The Transitivity of Identity is the principle that whatever is numerically identical with a given thing is also numerically identical with whatever that thing is numerically identical with: (x)(y)(z){[(x = y) & (y = z)] ⊃ (x = z)} [Transitivity of Identity] What is the transitivity of