If you're in a position to "debate" with yourself it
could be a sign that you are not as sick as you think as you are...
But I see your point - I had a cold about a week and a half ago and chose to do some form of low-intensity cardio for 30 minutes on 2 of those days... It all depends on your symptoms and fatigue level. I also came across an interesting article online, but I don't think I'm allowed to post links here yet, so here's the relevant excerpt:
According to some physicians, there is a fairly simple way to decide if you should take it easy or not and it's called the neck up or neck down rule.
If your symptoms are from the neck up, meaning you have sniffles, a runny nose, headache and perhaps a very mild cough, it's probably OK to perform a mild workout. The key is to make sure you have no difficulty breathing during or after a workout. Definitely cut back, though, especially if you're a type A at the gym. Experts agree that going at one third your normal pace might be the best way to proceed and if you feel worse a few hours later - give yourself a few days rest.
If you're symptoms are primarily neck down, that is you've got a deep chest cough or a fever, you should skip working out altogether until you feel much better. Chest pain means you most likely have inflamed tissue in the lungs and working out will cause an even worse inflammation. Sleep and rest are the better choice.
Hope this helps. Cheers and get well soon.