In response to my post entitled Your Team's Answer is Wrong, my colleague Bob Lee writes -- 

(You wrote) "The trainers passed out a copy of the correct answer for the case study to all of us." (emphasis added) The definite article the as opposed to the indefinite article a is a killer here. Had they framed their solution as a solution rather than the solution would you have the same issues? (Even a correct solution affords room for other and even better solutions)