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The essay presents a dichotomy between theory and practice.
It shows a split into two opposite groups.
A division or contrast between two things that are presented as entirely different.
There is a clear dichotomy between good and evil in the novel.
The story sharply separates the concepts of good and evil.
The researcher noted a dichotomy in the data: one group improved, the other declined.
The data showed two opposite trends.
Often followed by 'between' to specify the two sides.