premise: How to relieve itching from chickenpox<br>Resist the urge to scratch your skin. Chickenpox can be very itchy and the severity of the rash varies from person to person. Your scratching starts a scratch-itch cycle that will never end.
hypothesis: Every person will get a rash on his nose from chicken pox.
reason: Not every person will get the rash on his nose. Some people may and some people may not. The passage does not state whether they all get it on their nose. 