do your own research
A term used by people too lazy to provide their own sources to back up their argument.
“Vaccines cause cancer, do your own research.”
Do your own research
A phrase meaning "Google until you find something that agrees with you". Typically used to pretend the person saying it is somehow smarter than all of the experts.
I don't believe in government vaccines, COVID is the flu, and masks don't work! Do your own research!