I have achieved similar results by similar means in both English and certain other subjects wherein one would assume a “true academic” would “know better” (picking out Sin[x]=2 as being “evidence of error in prior working” when x could merely be Complex, or marking “f[f[n]]=-n as “unsolvable” when it’s just requires a bit of lateral thinking). This always depresses me, like when (as a Brit) I hear Americans say “I could care less” as an indicator of disregard, when actually that indicates they are somewhere above the point of minimal regard.