verb

expose the falseness or hollowness of (an idea or belief).

she debunks all the usual rubbish about acting

explode,deflate,puncture,quash,knock the bottom out of,expose,show in its true light,discredit,disprove,contradict,controvert,confute,invalidate,negate,give the lie to,prove to be false,challenge,call into question,shoot full of holes,shoot down in flames,blow sky-high