The Universe is Not Infinite

Since we cannot possibly know what is happening/happened beyond 15B light years away, we cannot scientifically determine whether the universe is infinite or not.  You can then understand the finiteness of the universe to be a non-question, a religious question, or a philosophical question.  I advance my following theory as dealing with the philosophical question.

Our systems of reasoning are not entirely tethered to what we can observe.  It seems indeed that powerful analytical systems that are able to reach to the edge of reality must as well reach beyond it just to fully see the edge.  Thus we can create arbitrarily large or small numbers that need not have any association to reality.

And Infinity is a concept that is beyond numbers we can write down and incorporate with our other laws of numbers.  It is a special number to which our ordinary operations do not apply.

It is an abstraction beyond our ordinary abstractions which are already not entirely tethered to observable reality.

Therefore it is very unlikely that The Universe or any other real entity is either infinitely large or infinitely small.

An infinite universe would also have many ideas that are almost inconceivable themselves, such as infinitely many of each of us (which would therefore have to occur in identical cities, planets, etc) as well as every possible thereof.  Say, me with eyebrows that are 1 micrometer longer, 1/2 micrometer longer, 1/4, and so on forever.

If there is no infinity, human individuals are almost certainly unique, as to create an identical one requires circumstances so identical as to produce identical solar systems, planets, asteroids, everything which led to the creation and evolution of life in exactly the same configurations.

Now, this is not to say that there couldn't be planets where apex preditors like us who can grasp things with their hands suddenly became Intelligent in a similar way, leading to agriculture, cities, civilizations, wars, and all the other parts of our modern existence.  That could be a highly likely path once certain preconditions are met, as we now understand is the case with the genesis of life itself.  And it also could, and most likely does given what we see now (no other intelligent life in view), generally wipe itself out, or get annihilated by some other means, before too long after it arises.