This confuses the public and undermines trust in science and scientists.

Some interesting examples:

1) As COVID-19 spread early in the pandemic, epidemiologists confidently stated many true things about it that were scientifically measured (e.g., rate of spread). Some of them were also equally confidently stating things that were just speculation (e.g., its origin being natural).

2) String theorists told the public many true and interesting things about string theory (e.g., why they feel it’s exciting). Some also confidently claimed very uncertain stuff like:”Superstring theory successfully merges general relativity and quantum mechanics.”

Being charitable, perhaps this could be interpreted not as a claim about superstring theory providing a correct theory of physics but rather as a statement about what superstring theory is doing mathematically. Even if so, though, this is – at the very least – going to be very confusing to those who read it. The statement also makes superstring theory seem like it can claim great achievements that perhaps it can’t.

3) Biologists confidently tell the public many true things about how cells form, how evolution works, and so on. Some, unfortunately, have made overconfident claims about a subject that is extremely uncertain: how life formed on Earth. We have only highly speculative theories.

Let me be clear: most scientists don’t engage in what I’m describing above. But when people claim something has been scientifically PROVEN when it actually hasn’t, this tends to reduce trust in the scientific enterprise and causes people to doubt scientists.

My field (psychology) is squishy enough that (unlike physics/biology) little has truly been PROVEN beyond a doubt. At best, we can usually say that studies have found a relationship or that (based on our own interpretation of the evidence) we believe a certain thing.

This piece was first written on August 13 and first appeared on this site on August 23, 2023.