Do the ordinals form a set?(adsbygoogle = window.adsbygoogle || []).push({});

I'm confused, I thought that they form a set, but the Burali-Forti paradox says that they are not a set, but instead a proper class.

I always thought that a set was a finite or infinite collection of things. If the ordinals are an infinite collection of things, I do not see why they can't form a set

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# Do the ordinals form a set?

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