Answer this question yes or no: If the problem you solved before you solved the problem you solved after you solved the problem you solved before you solved this one, was harder than the problem you solved after you solved the problem you solved before you solved this one, was the problem you solved before you solved this one harder than this one?
Show how you decided.
Surprisingly enough, there are only two problems being referred to here. We can see this by carefully shading in green all references to the “problem before” and shading in pink all references to “this problem,” as follows:
If the problem you solved before you solved the problem you solved after you solved the problem you solved before you solved this one, was harder than the problem you solved after you solved the problem you solved before you solved this one, was the problem you solved before you solved this one harder than this one?
Yes, PB (the problem before) was harder than PT (this one).