Arguing over the precision of a part in the engineering business used to be the norm, years ago, a tenth (.0001") often disputed depending on ones "feel" with a micrometer, now with digital comparators and all manner of technology the doubt is removed down to parts of a micron. But even then absolute yes or no is debateable . Depending on the application, one man's perfection is another man's piece of shrapnel.
I thought I had retired from this stuff!
Wasn't there an engineer a while ago remarked "the fit between the cylinder and piston was so close you couldn't get a shilling piece between them"?