かなら必kanaraずしもzushimo
1.
An expression used to indicate that while something may be true in some instances, it does not apply universally to all situations or cases.
2.
A phrase that conveys a sense of partial negation, suggesting that something is true to a degree but not in every circumstance.
3.
An adverb that serves to emphasize that a certain condition does not guarantee a particular outcome across the board.
4.
A way to articulate that just because one factor is present, it does not mean that the result will inevitably follow.
Example:
金持ちが必ずしも幸福とは限らない。