The world-famous skeptic, James Randi, finds a lot of support for his work in his horoscope.  Traditionally, Fire signs act with energy, confidence and ambition; and with a Leo sun sign there is ready potential for showmanship.

With four planets in Leo his charisma quotient would be quite high, especially with Venus there to add to his appeal. In addition, so much fire brings out a robust self-confidence and aggressive optimism.

In terms of raw skepticism we look at two main points in a horoscope; and he has these two points working together and revealing a not unexpected penchant for skepticism. In fact, the skeptical quotient is backed up by two planets that define a powerful intellect. Putting this together it would be very easy for him to rationally disassemble any argument into a collection of dubious assumptions.

All in all, he has the horoscope of a vibrant advocate of rational thought, of the reductionist kind; and who has great technical and mental competence - a mind like a steel trap might do him justice here.  However, because of the strong Fire component (which leads to impulsiveness) astrology would suggest that he would be vulnerable to dismissing ideas or making decisions too quickly.  However there would be few that could successfully debate such choices with him.

Please note that an inaccurate horoscope about James Randi was posted earlier - my fault, I did not double check my sources.

In that horoscope (out by 20 days) there was a much stronger emphasis on (Earth) practicality and raw toughness of character.  In the correct horoscope the emphasis on Leo style attributes (like showmanship and leadership) comes dramatically to the fore.

Interestingly the penchant for skepticism grew stronger and largely due to the two planets that (when synchronized which they are) usually point to a powerful intellect - and that intellect is strongly integrated with the skepticism in his chart.

It should be noted though that the skeptical trait was around for a few months in 1928, so quite a few people had this tendency.  However, in Randi’s horoscope it is hard to imagine a day when it was more powerfully emphasized.