Dude, what are you smoking? Did you know for a fact that it was a price mistake?
Your right, As long as you don't know for an absolute
fact , you can play stupid and rationalize. If you want proof that this is so, go and ask all the "frum" people locked up in prison for fraud who weren't sure all the stuff that they were doing were absolute facts that it was fraud or aka "iffy" stuff.
And I must agree, I definitely must be smoking something. I think it's called Truth and common sense mixed with a tinge of honesty - this mixture is potent to many.
Yours truly,