Idiom - No Brainer

No Brainer:

If something is a “no brainer”, it means that it’s a “very easy decision“.  It means that you do not need to think hard about the choice at all because the proper decision should be so obvious.

Let’s go to the Italian restaurant today because everything on the menu is half price for only today.  We can go to the other restaurant another day.  This is a no brainer.

Why don’t you date Jamie instead of Kate?  Jamie is much more beautiful and she’s a lot friendlier as well.  It should be a real no brainer.

Quotes - Jeffrey Eugenides

Jeffrey Eugenides:

Biology gives you a brain. Life turns it into a mind.