1.Charge conjugation (C): this symmetry involves replacing every particle in your system with its antimatter counterpart. It’s called charge conjucation because every charged particle has an opposite charge (such as electric or color charge) for its corresponding antiparticle.
2.Parity (P): this symmetry involves replacing every particle, interaction, and decay with its mirror-image counterpart.
3. Time-reversal symmetry (T): this symmetry mandates that the laws of physics affecting the interactions of particles behave the exact same ways whether you run the clock forwards or backwards in time…
On the experimental front, particle physics experiments have been operating for decades to search for violations of CPT symmetry. To significantly better precisions than 1-part-in-a-billion, CPT is observed to be a good symmetry in meson (quark-antiquark), baryon (proton-antiproton), and lepton (electron-positron) systems. Not a single experiment has ever observed an inconsistency with CPT symmetry, and that’s a good thing for the Standard Model. Ethan Siegel, “This Is The One Symmetry That The Universe Must Never Violate” at Forbes
Sounds like a designed system all right. Too bad that’s a problem for many physicists.
Most of the crackpot cosmology is developed by people who have a problem with the idea that the universe shows evidence of design, whether their bitch is the Big Bang or fine-tuning. Those people can be loads of fun as long as no one is required to take them seriously.
See also: The Big Bang: Put simply,the facts are wrong.
What becomes of science when the evidence does not matter?
and
The multiverse is science’s assisted suicide
As to these comments from the article:
But why should CPT symmetry even care that “the laws of physics stay the same for observers in all inertial (non-accelerating) reference frames?”
Lorentz invariance, and therefore CPT symmetry, simply makes no sense under atheistic materialism. More specifically, it makes no sense under the Copernican Principle and/or the Principle of Mediocrity.
If the Copernican principle, and/or mediocrity principle, were actually true then there simply should never be any special consideration that is ever given to observers in the universe. But that is not what we find. Again, “If the CPT symmetry is a good symmetry, then the Lorentz symmetry — which states that the laws of physics stay the same for observers in all inertial (non-accelerating) reference frames — must also be a good symmetry. If you violate the CPT symmetry, then the Lorentz symmetry is also broken.”
I hold this, i.e. the correspondence between CPT symmetry and Lorentz symmetry, to be yet more confirming evidence that the Copernican principle is a false assumption: