Contradictory claims made by some experts is a characteristic of Pseudoscience fact.
EXPLANATION:
Pseudoscience is characterized by contradictory claims that are said to be scientific, but they are not compatible with scientific methods. They are the statements or beliefs that are usually not open for evaluation by other experts.
Also, these are not studied facts which means there is a lack of evidence to support them scientifically. These beliefs are also very resistant to change. For example, Astrology is a Pseudoscience. Other examples are theories related to Bermuda Triangle, Ancient Aliens, etc.