Fun:How to disprove astrology

Introduction
Astrology has been shown to be pseudoscientific by numerous studies, but the general populace is usually unwilling to put in the effort into reading a scientific paper. Instead, there is a simple street epistemological experiment one can perform to debunk all of astrology; not only does it debunk the Western Zodiac, it also debunks theChinese Zodiac and any other Zodiac system in existence. The fact that astrology can be falsified by simple street epistemology and by rigorous scientific research is enough to ignore the claims astrologers make about astrology.

Procedure

 * 1) Give examples of identical twins with different personalities and life stories
 * 2) Explain that there is no way for astrology to be based in reality if identical twins can have different personalities and life stories (also debunks genetic determinism, killing two birds with one stone)

The astrologer might try to BS out of this trap, but the astrologer has ultimately been checkmated. Checkmate, astrologers!