Spanish phrase
No estoy convencido.
Meaning
I'm not convinced.
When to use it
Expresses doubt or lack of acceptance. Used to politely challenge a suggestion and prompt more explanation, neutral and slightly cautious tone.
Example dialogue
No estoy convencido de que eso funcione.
I'm not convinced that will work.
¿Qué parte te preocupa? Podemos revisarlo.
What part worries you? We can go over it.