Anyone familiar with Western astrology will know that these signs represent two completely different forms of personality, but they can occur in the same person in various ways. For example, one person may have the Sun in Taurus and the Moon in Sagittarius. Another May have the Sun in Sagittarius and five planets in Taurus. My friend Margaret, who is an expert birder, sees warblers where I see none and then tells me which one is which by its song. It's the same thing with people watching, experience counts.
Human beings are complex entities.
The world of astrology is certainly not exempt from problems like this. Astrology is not a hard science. This is exactly the same thing as medicine. Doctors use scientific tests, but they disagree amongst themselves. Conflicts of opinion over the astrological meaning of a newly discovered planet arise from time to time.