May courts presume a person is competent to agree to commitment for treatment if a doctor opines that he isn’t?

Dane County v. N.W., 2019AP48, 8/29/29, District 4 (1-judge opinion, ineligible for publication); case activity N.W. entered a written stipulation to extend his Chapter 51 involuntary mental commitment. On appeal he argued that due process required the circuit court to conduct a colloquy to determine whether he knowingly, intelligently and voluntarily agreed to the extension […]
Source: WI Public Defenders – On Point
May courts presume a person is competent to agree to commitment for treatment if a doctor opines that he isn’t?