The Dunning–Kruger effect is a cognitive bias in which incompetent people overestimate their ability and consider themselves much more competent than actually is. Essentially, not only they are incompetent, but they also fail to recognize their incompetence.
The Dunning–Kruger effect is very prevalent in flat Earth communities. Many of them are without basic scientific knowledge, yet consider themselves superior to scientists that have spent a significant part of their lives doing scientific research.
References
- Dunning–Kruger effect – Wikipedia