What do you think of Catch weights?

[bzkfn]

Assumptions:

1. Cotto can't beat PAC at 140.
2. PAC can't beat Cotto at 147.
3. Cotto can beat PAC at 143/144 and PAC can beat Cotto at 143/144.

Make the fight at a catchweight of 143/144...
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After seeing the fight against Oscar and how strong Pac looked as a Welter, why couldn't he beat Cotto at 147?

That's the general assumption that PAC can't beat Cotto at 147...
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Who assumes that? I haven't heard that from anyone.