> You can have pneumonia that shows up on a chest X-ray (a sign) without any symptoms. Your post is a bit confusing, I'm not exactly sure what you're arguing.

> You can have pneumonia that shows up on a chest X-ray (a sign) without any symptoms. Your post is a bit confusing, I'm not exactly sure what you're arguing. Walking pneumonia (which is what you're describing; the term of art is atypical pneumonia) is extremely rare, and it's not what we're talking about here. Non-atypical pneumonia has symptoms, ergo is by definition not asymptomatic.