Deductive Reasoning

Every year (and I do mean every) I mess up and buy brown eggs for Easter egg dying.  Luckily, Shawn had bought white eggs but then he ate two. I boiled those 10, and then just added two of the brown ones to make an even dozen. 

A while later, I asked Charlie to check and see if the eggs were cool enough to dye. He came back from the fridge and declared they weren't quite ready yet. Two of the eggs were still brown.