no sabe la diferencia entre

doesn't know the difference between

→ no
phrase Rare #29,844
doesn't know the difference between Used to say that someone cannot distinguish between two people or things. The subject and verb can change, as in no sé la diferencia entre (I don't know the difference between).
SP: Mi hijo no sabe la diferencia entre una ballena y un delfín.
EN: My son doesn't know the difference between a whale and a dolphin.

Tom no sabe la diferencia entre Europa y la Unión Europea.

Tom doesn't know the difference between Europe and the European Union.

Tom no sabe la diferencia entre una fábula y un cuento de hadas.

Tom doesn't know the difference between a fable and a fairy tale.

Tom no sabe la diferencia entre Rusia y la URSS.

Tom doesn’t know the difference between Russia and the USSR.

Mi hermana no sabe la diferencia entre un ganso y un pato.

My sister doesn’t know the difference between a goose and a duck.

Ella no sabe la diferencia entre templos y mezquitas.

She doesn't know the difference between temples and mosques.

— Bajrangi Bhaijaan (2015)

Tom no sabe la diferencia entre una estrella y un planeta.

Tom doesn't know the difference between a star and a planet.

Tom no sabe la diferencia entre Irak e Irán.

Tom doesn't know the difference between Iraq and Iran.

Tom no sabe la diferencia entre una verdad y una mentira.

Tom doesn't know the difference between a truth and a lie.

Tom no sabe la diferencia entre astronomía y astrología.

Tom doesn't know the difference between astronomy and astrology.