I beg to differ
US /aɪ bɛɡ tə ˈdɪfər/
UK /aɪ bɛɡ tə ˈdɪfər/

1.
me permito disentir, no estoy de acuerdo
a polite way of saying that you do not agree with someone
:
•
You say it's a good idea, but I beg to differ.
Dices que es una buena idea, pero me permito disentir.
•
He claimed the report was accurate, but I beg to differ.
Afirmó que el informe era preciso, pero me permito disentir.