Originally Posted by
Patty Hann
Fair enough (that rhymes, you see, with what you said :)).
And I used the door example to illustrate the accumulative error... but I think it would still be significant enough if one were making, say, a bank of kitchen cabinets.
One thing I find kind of headscratching is that the same folks who are Ok with a not quite square square will use a razor sharp marking knife to make a cut line.
Now, as long as you know the error/tolerance of your square, or any tool, and as long as you maintain consistency in accounting for that error, you will be fine (and that "sign" + or - is also important :D)