I agree with Dr. Jey McCreight on the science.

But for determining truth, both sides are wrong here.

Dunning-Kruger is bad, but so is credentialism and appeal to authority.

Many people with PhD's have had Dunning-Kruger. Someone else mentioned Ben Carson being great at neurosurgery, but not politics.

A PhD doesn't make you infallible.

I am saying this as someone who is taking graduate-level courses and will be pursuing my PhD. When I'm correct, it's not because my future PhD causes reality to magically conform to my opinions - it's because I rigorously looked at the evidence, logic, and formed my own conclusion that better aligns with reality.

Confidently incorrect is the default with these people. I spend most of my time with family aggressively correcting misinformation about my field and related ones. They will die earlier thinking they know more because of Youtube. Getting them to stop taking bad health advice and mystery joint injections from a fucking chiropractor is the latest battle.

To be fair, a Person with a PhD still can have Dunning-Kruger on other subjects.

Ben Carson is a great Neurosurgeon, but dumbass on politics.

Note how they always enshrine gender in biology, but then make all kinds of non-biological statements about what gender is.

"XX is woman"/"Large gametes is woman"/"can conceive is woman"

And then they'll say

"Women aren't as aggressive", "women are more emotional", "women like being in the home more", "those are women's clothes", etc.

The only reason it's so important for it to be biological is because of how it punishes gender non-conformity and makes the lives of trans people hell. Like it isn't ideologically consistent and they know that. They just don't care. If it was just about genitals or chromosomes, then why is it that gender dictates all these social things about us? The only reason to root gender in how you were born is to ensure gender roles are as rigid and immutable as possible.

Critically thinking now, how strong is the evidence here?

I think a lot of these XX XY "only two genders" people aren't just dunning Kruger, they're transphobic idiots with an agenda. So even if they had the science and knowledge it wouldn't matter because they're pushing their hateful stupid agenda, facts and logic be damned. They don't care, they just want to rationalize hating us trans people because we make them uncomfy.

The phrase is funny but you wouldn't catch me dead wearing a logical fallacy

Wait until they learn about XXY, XYY, and XO individuals.

"Yeah but science can be proven wrong an change over time, while my beliefs and biases are forever!"

One time a woman told me that my lack of a second X Chromosome meant I would "always be a man"

So I gaslit her into thinking her husband had klinefelters.

I hate how Republicans think transphobia is science

While this is very funny, and definitely representative of a sort of ignorance/arrogance commonly found in ideologues - I recently learned that most people talking about the effect have, in fact, been Dunning-Krugering themselves.

Insightful video on the topic.

What most people expect the effect to look like:

What the actual results were:

....and all in between, hormonal and/or physically. "Only two genders" is false