0 something that tricks your eyes and makes you think you see something that is not really there, or see it differently from how it really is --
1 something that you think you see, but that is not really there: --
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.
We kunnen het stap voor stap voltooien, hoe lang de weg ook is en het kan niet worden voltooid, hoe kort de weg ook is, als je niet eens je voetafdruk markeert.