The Kalam Cosmological Argument

You're in the same epistemic boat that I'm in. Don't pretend that you have the authority to define the Universe as that which exists.

Why do you believe that anything can pass through a singularity?

 

It's not my definition. It is the classic definition going all the way back to the ancient Greeks.

There is certainly a more modern usage where it is sometimes used to mean only that part of the classical universe within which we are confined, but certainly you would agree that if our discussion is the KCA, such a neutered usage would be inappropriate.

Because we have many empirical examples of matter and energy passing into singularities, and at least one empirical example of matter and energy coming from a singularity.

Connecting those dots is not a difficult conceptual exercise.