Nowadays Coporations who wish to discredit solid scientific reasearch that might hurt their profits will employ this tactic.
Pesudo facts involve Cherry-picking edvidence, and creating rigged experiments that can confuse or mislead people.
John: That's a pseudofact. I've been doing it for years, and I can see just fine.
Doctor: You should drink eight, eight-ounce glasses of water a day.
Patient: Bull, that's a pseudofact. We get almost all the water we need in the food we eat.
Kristen: That moon has phases because it's partially behind the earth's shadow. That's what my teacher taught me.
Eric: No, that's a pseudofact. The moon has phases because of the angle between it, us, and the sun.
Republican: Obama's health care bill will create Death Panels.
Democrat: That's a pseudofact. The bill would just pay for discussions with doctors about things like living wills.
Any urban legend is a pseudofact.