Ichneumonwasp
Unregistered
- Joined
- Feb 2, 2006
- Messages
- 6,240
OK, let's see. You say:
To which I say:
To which you say:
Um, what?
No difficulty here. I have repeatedly said that adding new selection pressures, holding potency constant will increase the total selection pressure. So stop wasting my time, your time, and anyone else's time repeating the same strawman error over and over again.
Actually no, we don't know that. We do not know if a particular pressure in one context would act as an independent pressure in the context of several other pressures. There may be one pressure that is so strong in reducing reproduction that additions will have no effect. There may be a mild pressure, such as heat in reducing sperm production that will have no real pressure in the real world because it is only applied to a select group that is busy being eaten by tigers. Additional selection pressures do not always slow the process.
That is exactly what is not shown by the data on resistance. The development of resistance depends critically on the strength of the selection pressures. Three HIV drugs that are not terrible potent with nearly perfect compliance results in resistance. There is no denying that reality. Current, more potent triple therapies, with nearly perfect compliance slows the development of resistance. Current, more potent triple therapies, with 80% compliance speeds the development of resistance. Current, more potent therapies, with compliance below 80% slows the development of resistance.
Deal with that issue and that issue alone before proceeding further.
Kleinman said:What ev is showing is that each additional selection pressure slows the evolution process.
To which I say:
Ichneumonwasp said:Everyone knows that the evolutionary process is slowed by the addition of selection pressures, if the new selection pressures produce independent effects.
To which you say:
Kleinman said:What you are still having difficulty understanding is that multiple selection pressures no matter what their potency slows evolution for each of the selection conditions.
Um, what?
No difficulty here. I have repeatedly said that adding new selection pressures, holding potency constant will increase the total selection pressure. So stop wasting my time, your time, and anyone else's time repeating the same strawman error over and over again.
Increasing the number of selection pressures will always slow the evolutionary process.
Actually no, we don't know that. We do not know if a particular pressure in one context would act as an independent pressure in the context of several other pressures. There may be one pressure that is so strong in reducing reproduction that additions will have no effect. There may be a mild pressure, such as heat in reducing sperm production that will have no real pressure in the real world because it is only applied to a select group that is busy being eaten by tigers. Additional selection pressures do not always slow the process.
And this is shown in reality by the use of multiple antimicrobials which delays the evolution of resistant strains of these microbes.
That is exactly what is not shown by the data on resistance. The development of resistance depends critically on the strength of the selection pressures. Three HIV drugs that are not terrible potent with nearly perfect compliance results in resistance. There is no denying that reality. Current, more potent triple therapies, with nearly perfect compliance slows the development of resistance. Current, more potent triple therapies, with 80% compliance speeds the development of resistance. Current, more potent therapies, with compliance below 80% slows the development of resistance.
Deal with that issue and that issue alone before proceeding further.