Very true
“When the time is ripe for certain things, they appear at different places in the manner of violets coming to light in early spring.”
— Farkas Bolyai, to his son Janos, urging him to claim the invention of non-Euclidean geometry without delay.
Quoted in Li & Vitanyi, An introduction to Kolmogorov Complexity and Its Applications, 1st ed., p. 83. Wikipedia entry on “Multiple discovery”


