Her reasons for leaving were 'obvious'. = It's 'obvious' why she left.
You are stating 'the obvious'. Tell me something I don't already know.
Her doctor immediately noticed the 'obvious' signs of the disease.
(..) - Part of the job. - Talk about what? I want to find out what time her plane is leaving in the morning. - Why not just ask her? - Too obvious. I may have to pump her for information. - I see. - Inspector... ...would you like to join me (..)2006 The Pink Panther
(..) - Something has come up. If the weather stays this mild, we are all in for a treat. - Place your bets. - I am in law enforcement too. Am I that obvious? No, it's just that I have an ear for such things. Here is your mojito. - Flame it. - No more bets. (..)2006 The Pink Panther