AND, OR, NOT, TRUE, FALSE – DAX Guide
AND: Checks whether all arguments are TRUE, and returns TRUE if all arguments are TRUE.
https://dax.guide/and/
OR: Returns TRUE if any of the arguments are TRUE, and returns FALSE if all arguments are FALSE.
https://dax.guide/or/
NOT: Changes FALSE to TRUE, or TRUE to FALSE.
https://dax.guide/not/
TRUE: Returns the logical value TRUE.
https://dax.guide/true/
FALSE: Returns the logical value FALSE.
https://dax.guide/false/