challenge on

challenge someone on something

to dispute someone's statement, remarks, or position. I think Fred is wrong, but I won't challenge him on his estimate.

Name	Pronounced	Usage
Joetta	-	English
Allyson	AL-i-sən	English
Aylmer	-	English (Rare)
Oriane	-	French
Dominicus	do-MEE-nee-kus (Dutch)	Late Roman, Dutch
Iseut	-	Medieval English