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.
(..) No, it's not Amy. Hello, dear. You called my mother? Oh, Leonard, is it really necessary to caption the obvious? He's been like that since he was a toddler. "Look, Mommy-- a butterfly." Maddening. What's going on? (..)2011 TvShow: The Big Bang Theory Title: The Skank Reflex Analysis Season: 5 Episode 1
(..) "It's not what it looks like." Just let it go, Sheldon. If I could, I would, but I can't, so I shan't. Now, knowing Penny, the obvious answer is, they engaged in coitus. But... since that's what it looked like, we can rule that out. (..)2011 TvShow: The Big Bang Theory Title: The Skank Reflex Analysis Season: 5 Episode 1