YOU SAID:

How can this thing tell what we're talking about

INTO JAPANESE

私たちが話していることをどうやって見分けることができますか？

BACK INTO ENGLISH

How can you tell what we're talking about?

INTO JAPANESE

どうやって分かる？

BACK INTO ENGLISH

How can you tell?

INTO JAPANESE

なんで知ってるの？

BACK INTO ENGLISH

How can you tell?