"The ten-thousand thing-kinds are ultimately alike and ultimately different. This is called the great similarity-difference." - Zhuangzi

In meric's model, the student who get good grades aren't the same ones achieving mastery. In mafribe's, they are.

I must insist although "achieving mastery" is clearer than "knowing the content", I meant the same. It would probably help if I wrap "knowing" in asterisks like "knowing the content".