Proof A=A

[Welsh cake]

Again you are asserting that God is logically impossible which cannot be substantiated - unless you can enlighten us all how. I only know of rational reasoning that states we cannot know, and not what you are asserting here, that you do know of a logical impossibility.

You are making an absolute statement that God is logically impossible are you not?

This depends on your definition of God, by God, I'm assuming you mean the Christian one, whose ontology at best is self-contradicting, and at worse features attributes that are so vague it ceases to have any practical relevance, either way sky daddy is a logically impossible concept.

Now, higher beings or more complex life forms may exist, but we cannot know because without sufficient evidence there's no valid reason to believe they do.

The default position is that we cannot know. God, defined as scientifically unprovable, supernatural etc.. would require supernatural methods of detection. So how exactly are you ruling out something you are ill equipped to know?

How do you know that we cannot know?