I didn't find anything for 2019-20, but DeMarcus Cousins had his most points in a game in 2018-19 versus the Nuggets on April 2, 2019, with 28 points.

what are the most points in a game this season by demarcus cousins
Interpreted as:
What are the most points in a regular-season game this season by DeMarcus Cousins?

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