French phrase
Je ne suis pas convaincu par ~.
Meaning
I'm not convinced by ___.
When to use it
Shows that the available evidence seems insufficient. It can express polite disagreement or hesitation.
Example dialogue
Voici notre plan pour réduire les coûts.
Here is our plan to reduce costs.
Je ne suis pas convaincu par ce plan.
I'm not convinced by this plan.