Too many chiefs and not enough Indians....

Years ago while working on some fancy arse project we realised the drawing was all to cock so go and see said cad jockey to point out that it doesn't work out...he insists that it does because the computer says it does...so to teach the cock a lesson we carried on only to find the job was totally wrong....who got the blame?....We did because the sly git changed it and never said anything.
Moral of the story is to make it regardless because cad never tells lies....yeah righty!