Huh?A first cause would not be subject to entropy. It is not caused therefore would be self existent, not subject to change or the law of physics. A first cause directly and indirectly caused everything that is.
One can claim there is no such thing but that just removes that one from discussing what is intrinsic to a first cause.
This is word salad which does not address a single point in my previous post which countered your claim a first cause (whatever that may mean) can occur outside the universe resulting in an observable effect.
Your response indicates you do not understand what a particle horizon is.
Let me explain without using the general relativity found in the Wikipedia link but simple arithmetic.
You have probably heard the universe is expanding and the further an object such as a galaxy is away from us the observer, the greater its recession velocity.
Distant galaxies can exceed the speed of light c since the rate of expansion of space-time is not constrained by c.
A galaxy with a recession velocity v emitting photons back towards the observer is causally connected with the observer if v-c ≤ c.
If v-c > c the observer and the galaxy are not causally connected; this represents a boundary known as the particle horizon.
Objects inside and outside the particle horizon are separated both temporally and spatially.
A cause occurring outside the particle horizon will never have an effect inside the particle horizon which is our observable universe as the carriers of information, the photons travelling back towards the observer, will never reach the observer.
In simple terms the expanding observable universe can never catch up to be causally connected with the receding galaxy.
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