“First rule of science: in order for something to be scientific, it must be observable.”
I think the FIRST rule is that it must be falsifiable. Evolutionary theory is falsifiable. Creationism is not.
“Darwinism is not observable.”
What you’re fishing for is ‘repeatable observations.’ The fossil record is available to any researcher, for example. Darwin’s finches.
“You do not see lizards changing into chickens, for example, today.”
Chickens don’t come from lizards.
“Some point to adaptation or mutation as evolution. But adaptation is not evolution.”
Can you then, please, define evolution?
"And mutation is rare, random, and almost always results in a DEvolution of a creature.”
First, you probably have about 50 traits in your DNA that you did not inherit from either parent…mutations. Everybody has them, exactly because the replication process is not perfect.
Second, there’s no such thing as devolution.
“In addition, EVERY "fossil" that is "evidence" of evolution has been debunked.”
This is a lie. Straight up.
“Remember the Ceolicanth "fossil" that turned out to be false?”
It never turned out to be false. There are real fossils of the Coelacanth. And there are living examples. Neither fact makes the other a lie.
“Or the "Neanderthal" tooth that turned out to be a pig tooth?”
You’re talking about Nebraska Man, and it was a mistake, which science corrected. it never made it into a textbook.
“Furthermore, scientists cannot agree on a theory of evolution. I've heard at least three different theories which clearly contradict each other. They cannot all be true.”
Even if we’re still looking for more evidence, that doesn’t make the controversy a falsification.
“Finally, if Darwinism is true, then the Bible is false, and worthless. They cannot both be true.”
If evolutionary theory is true, Genesis cannot be LITERAL history. There are other options.