Yep my cutlery has to be parallel,, sometimes I have to move over to be inline with the cutlery , just to make sure my line of sight is not playing with my precision.
--Makes us guys really good in the Lab!
..How about features in nature,,, where the sporadity is incalculable ... do you try to find something to 'calculate'
eg. driving down a dirt track , you make your wheels follow perpendicular to to the track,,, but sometimes you miss calculate, or there can be a section in the road where it's no longer perpendicular (I usual steer into it and try to follow the path of least resitance) --my passenger(s) are usually noted to say,, what are you doing, where are you going - I just remark,,, I;m following the road -usually angrliy -like as if they concentrate on driving.
Then ther's the trees, the fallen branches, the amount of stemming branches, the angles those stemms make ,etc etc. then a bridg approaches, and I'm in the ravine!