You are most likely wrong.
Some fighters put up to 45 pounds on before fight time (Tito Ortiz)
So if Anderson Silva went down well below his normal weight he could probably put on 20 pounds or so and be around 198 come fight time.
And i'm Santa and will give you a Tito dummy by Christmas.
Lyoto Machida, former UFC LHW hamp
Future UFC MW Champ
Benavidez, Barao, Aldo, Nate, Nick, Lyoto, TBD, JDS
Forever hanging in Anderson Silva nuts