After 51 years, the "Z-340" cypher text from "Zodiac" serial killer has been solved: https://edition.cnn.com/2020/12/11/us/zodiac-killer-cypher-340-code-trnd/index.html
Now that we have the problem and the solution, when I'm watching the cypher text again I'm like "Ho.. look, look, it's so obvious! The sign must mean this and that and the following letter is transposed according to the sign and if you like at this and that there is a clear relationship between the age of the captain and whatever this thing mean!! Ha! It must be!"
Even knowing that it's just wishful thinking, I'm still willing it to be true: "Yeaaah, it's probably, 99.99% sure, just me imagining things.. BUT! That 0.01% doubt, I want it to be true anyway."
There is a name for this effect. I don't think it's the Barnum effect, it may or may not be a "confirmation bias". What is this effect called?