[a doctor looks distraught while giving someone bad news]
We are so so sorry…
The treatment failed
We tried our best, but your cancer is getting worse

[the person being given the news smiles smugly and replies]
Well you see, doctor, this individual example of a failure must mean that all cancer treatments fail and therefore we should stop treating cancer as a whole
I am very smart
Gotcha!

https://thebad.website/comic/terminal_defeatism