When making obnoxious technical corrections in a discussion, there are two things you must do if you wish to avoid simply being a jerk.
1. Your statement must in fact be technically correct.
2. Your statement must be relevant.
You have failed on #2. The person you responded to said:
This would probably have health implications.
220lb seem more than 100kg
Note that nowhere in there did he say anything about "weight". You are simply assuming that he meant "220lb weight seems more than 100kg weight". He could have also meant "200lb mass seems more than 100kg mass".
You have also arguably failed in #1. Kg isn't a measure of weight in the SI system. It is a measure of weight in the de facto system people use in the real world, and is defined as the weight of a 1 Kg mass in a 1 g field. Even scientists use this de facto system much of the time.
When making obnoxious technical corrections in a discussion, there are two things you must do if you wish to avoid simply being a jerk.
1. Your statement must in fact be technically correct.
2. Your statement must be relevant.
You have failed on #2. The person you responded to said:
Note that nowhere in there did he say anything about "weight". You are simply assuming that he meant "220lb weight seems more than 100kg weight". He could have also meant "200lb mass seems more than 100kg mass".You have also arguably failed in #1. Kg isn't a measure of weight in the SI system. It is a measure of weight in the de facto system people use in the real world, and is defined as the weight of a 1 Kg mass in a 1 g field. Even scientists use this de facto system much of the time.