wewbull t1_j96d4tw wrote

True. Local inflections like that can act as barriers to getting to a much more advantageous trait. I agree.

...but I also think it's wrong to say evolution is random. It's random experiments in a game of procreation. Those experiments which fail are discarded. As such the overall process is guided away from failure and not random.

Maybe I was asserting the positive case (towards success) too much, when the negative case (away from failure) is really the stronger aspect.


wewbull t1_j964efw wrote

It's random in the short term. In the long term, beneficial traits will improve survivability and be selected for. If staying in fever benefitted surviving it's reasonable to assume it would have arisen by chance and then been selected for by now.


wewbull t1_j95tpui wrote

Sounds like a classical control feedback loop in engineering.

However if it was just this there'd be no reason the body wouldn't have developed some kind of hysteresis to "debounce" the system, latching the fever on for a period after the viral load drops to ensure the complete eradication of the virus.

I suspect the fever is expensive or damaging in itself. So the best system is something less drastic, but that might take longer to kill the virus.