"I assume you never heard of tigon/leopon/zorse/zonkey?

Are they all anomalies too?"

Yes, I've heard of them, and yes they are anomalies, most of these cases are all the result of man's imagination, and result in sterility. Also, when these cases exist in nature, which is extremely rare, they don't last. None of those examples has continued over the ages, even if they reproduce, they don't keep reproducing.

"My point in asking is if there are exceptions, can there be a rule that is absolute?"

The only absolute is that things are always changing, I'm just basing my views on what I witness as natural continuity, however I am not the final authority by any means.

"I didnt attempt to prove anything to you about the Basque people.

I provided some information. You can take it for what it is worth.

There are quite a few posts dealing with Rh-Negative blue bloods in the archives."

Okay, fair enough, I assumed you were going somewhere with the information.

Selam