Is "to" optional in this line?

Question

Japanese: Omae o tadashi katta (to) ukeireteita.

English: I did admit that you was right.

It's correct without "to"? Omae o tadashi katta ukeireteita.

Thanks!

Answer 1

Syntactically, without the と this sentence wouldn't be correct. Without the と, this sentence would have two predicates (正｛ただ｝しかった and 受｛う｝け入｛い｝れていた), and is clearly not syntactical. A sentence should has exactly one predicate.

Answer 2

お前を正しかったと受け入れていた。
Omae o tadashi katta (to) ukeireteita.

This と (to) is a quotative particle, and is mandatory. Even in the most casual and hasty conversations, people do not drop the quotative particle altogether. But と can be replaced with って in casual conversations.