What does bias mean in numerology?

In numerology, it is often said that life is biased. It refers to a person's fate is quite bumpy, or not smooth. This statement is very common in numerology, because a person's fate is influenced by many factors, including but not limited to birth time, place, family background, educational experience, career choice, health status and so on. Therefore, a person's fate is often uncertain, and sometimes he will encounter some difficulties and challenges, and sometimes he will encounter some opportunities and successes. In short, it is a general statement that a person's fate is bumpy or not smooth.