come fai a saperlo

how do you know that

→ come
phrase Rare #33,570
how do you know that Used to ask how someone knows a fact or piece of information. The final -lo means “it/that.”
IT: Come fai a saperlo così bene?
EN: How do you know that so well?

Come fai a saperlo, tu?

How do you know that?

— Lars e una ragazza tutta sua (2007)

E come fai a saperlo?

And how do you know?

— Don Juan DeMarco - Maestro d'amore (1994)

Come fai a saperlo, mamma?

How do you know, Mom?

— Il castello nel cielo (1986)

, come fai a saperlo?

Yes, how do you know?

— मुन्ना भाई एम बी बी एस (2003)

Tu come fai a saperlo?

How do you know?

— Tesis (1996)

E soprattutto, tu come fai a saperlo?!

And more importantly, how do you know?!

— The Garden of Sinners Chapter 5: Paradox Paradigm (2008)

Come fai a saperlo?

How do you know?

— Ratatouille (2007)