inconsistency
contradiction / instability / discrepancy / incompatibility
Noun
pl: inconsistencies
This term describes a clash between two or more elements that should logically align. It often carries a negative connotation of unreliability or error, whether in a person's testimony, a set of data, or a professional performance. In a technical or legal sense, it refers to a lack of compatibility between a new rule and an established standard. While it can be used as a countable noun to describe a specific instance of a contradiction, it is frequently used as an uncountable noun to describe a general state of instability or erratic behavior.
Meanings
Noun
The quality of being self-contradictory or lacking harmony in statements, beliefs, or actions.
"There is a glaring inconsistency between the witness's first statement and her second."