They’re have been studies on it.
One took two line, “a” and “b” one being clearly shorter then the other.
Participants came in groups to say which one is longer, but the twist was that most of the group was told to lie and say the clearly shorter line was longer.
Often the individuals who were not in on the lie would also state the shorter line was longer.
Heck we need only look at recent events where we all read and saw something, but when we were told we didn’t read what we read, or that it was taken out of context (even though it was backed up by the excuse) some changed their minds, and rather quickly.