Thanks for the link to the Forer effect.<p>Of course, if the proponents of astrology choose to present it in a non-falsifiable way, then it is not science from the get-go.<p>When astrology was conceived, it was actually respectable science, if that concept had existed then, and it led to the development of astronomy. If you can predict the flooding of the Nile by the rising of Sirius, what else might the heavens show you?