Hardheaded in a sentence as an adjective

I had never tried to teach her to program because she's as hardheaded as I am. Trying to force it on her was doomed to failure.

I am probably being hardheaded, but what takes hundred of thousand of dollars in the review process?

I've seen hardheaded engineers deny the value of the field of physics using exactly the kind of arguments you've laid out in this thread.

"\nEverybody is aware of the classic—and revered—image of the hardheaded decision maker, who cuts through nonessentials and goes after cold facts.

Hardheaded definitions

adjective

unreasonably rigid in the face of argument or entreaty or attack

See also: mulish

adjective

guided by practical experience and observation rather than theory; "a hardheaded appraisal of our position"; "a hard-nosed labor leader"; "completely practical in his approach to business"; "not ideology but pragmatic politics"

See also: hard-nosed practical pragmatic