By which one knows incorrectly dharma and adharma, what should be done and what should not — that intelligence is rājasic, oh Pārtha.

Rājasic intelligence: ayathāvat — incorrectly, not according to reality. Confuses dharma with adharma, duty with non-duty.

Sees good as evil and vice versa, distorted by desires and aversions. Knowledge is partial, biased by interests.