So you don't have to wait as long for obvious errors. Anywhere near as long, like a couple orders of magnitude in many cases - milliseconds vs minutes. Allowi

So you don't have to wait as long for obvious errors. Anywhere near as long, like a couple orders of magnitude in many cases - milliseconds vs minutes. Allowing ambiguity isn't just a style decision, it pushes error detection later, where you have enough info that it's no longer ambiguous.