SNIP

One included a guarantee that the buyer would be reimbursed
10 cent for every knot they found in the wood that they were shipped (this,
at a time, when the cost of a stud was well under a dollar).

Try springing this on the lumberyard the next time you buy some construction
timber.

END SNIP


Probably full dimensional, too.  Try finding some of those with or without
knots.

Joe