0 something such as a decision that is very easy or obvious: --
1 something so simple or obvious that you do not need to think much about it: --
Taking that job over the one I had was a no-brainer.
2 something that is very simple to do or to understand: --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.