ことは明白だ

it is obvious that

→ こと
phrase Rare #36,550
it is obvious that A formal expression meaning that something is clear or beyond doubt. The clause before こと is treated as a fact or situation.
JA: 彼が犯人であることは明白だ。
EN: It is obvious that he is the culprit.

彼が家にいることは明白だ

It is obvious that he is at home.

君が間違っていることは明白だ

It’s obvious that you’re wrong.

君が嘘をついたということは明白だ

It's obvious that you lied.