Precisely the opposite of what we now know to be true

Dr. Melik: This morning for breakfast he requested something called “wheat germ, organic honey, and tiger’s milk.”

Dr. Aragon: [chuckling] Oh, yes. Those are the charmed substances that some years ago were thought to contain life-preserving properties.

Dr. Melik: You mean there was no deep fat? No steak or cream pies or . . . hot fudge?

Dr. Aragon: Those were thought to be unhealthy . . . precisely the opposite of what we now know to be true.

Dr. Melik: Incredible.

Dialogue from Sleeper, 1973 film by Woody Allen set 200 years in the future.

I remember this from the original film, but came across it again recently in a book that I just downloaded: Reproducibility and Replicability in Science, published by the National Academy of Sciences.