"When such claims are made there must be some data to back them up."

Oh, but there IS, bobad...in innumerable astrology books! ;-) Only trouble is that...

Daylia would consider many of those books to be a reliable source in which she could place confidence.

You would not.

And I would just shrug, cos I frankly have no opinion one way or the other about it.

Amusing, isn't it?

All these debates are ever truly about, in my opinion, is people defending their own ego and its established views of reality. What is an authoritative source for one person may not be for another...that will depend on what views they already held before they consulted that source.

Not one of you really knows, in my opinion, whether or not astrology is true or whether it works. Not one. But you'd love to THINK you know. ;-) I KNOW that I don't know, and I'm perfectly okay with that.