うつつのしょうこでしょう
現の証拠でしょう
utsutsuno shōkodeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of げんのしょうこ

1. Likely evidence.; Probably evidence.; It's probably proof.

Polite
Presumptive
Conjecture
Usually Written in Kana