と判断した

concluded that

→ と
phrase Rare #38,634
concluded that Used to state that someone reached a conclusion or made a decision based on their assessment of a situation. It is relatively formal.
JA: 医者はすぐに手術が必要だと判断した。
EN: The doctor concluded that surgery was necessary right away.

彼の口ぶりから私の意見に賛成でないと判断した

Judging from the way he spoke, I concluded that he disagreed with my opinion.

神は存在しないなら何をすることも許されていると判断した

I concluded that if God does not exist, anything is permissible.