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by dllthomas 4412 days ago
That's why Maybe (without fromJust!) is so nice. You can ignore invalid data for as long as you want, but you can also draw lines and say "it can't have been ignored if flow gets to here". I'm certainly not arguing in favor of exceptions!

Edited to add: That said, I'd rather that 100 hours of computation be cut short than take longer and be equally useless...