From: No Game No Life (Anime) ep.1 timestamp 05:47

Context: Someone sent the main characters an anonymous email and addressed them as siblings. This is their reaction:


I understand the sentence means "How did they know us BLANKs (their clan's name) are siblings?"

I also found out that 知ってんだ? comes from 知っているのですか.

However, I would like to know how come 知ってんだ is attached to the conjunctive form of the copula (だって). I couldn't find an answer to this anywhere. Is it even a conjunctive form of the copula? Couldn't it be a contraction for という? But in this case, it's not like it makes more sense since it's followed by another verb.


と often informally takes the form って. It doesn't necessarily imply という here. 「なんで俺ら『空白』が兄妹だって知ってんだ?」=「なんで俺ら『空白』が兄妹だと知っているのだ?」

  • Thank you :) It's kinda driving me crazy how many things って can replace. Is there maybe a list of informal contractions somewhere? Jan 27 '21 at 15:34

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