Kooiti MASUDA wrote:

> I think it is reasonable that future uncertain profit should be
> discounted.  But I do not think it reasonable that future uncertain
> loss or cost should be discounted in the same way.

Well, a loss can often be viewed as a smaller gain. In fact, all the 
future "losses" predicted to arise from global warming are actually just 
reductions in the gains (certainly at a global level, and almost always 
at the local level too) that we might otherwise hope for.

If a 100% gain and 90% gain are both discounted at the same rate, then 
so inevitably is the 5% "loss" arising from following the 2nd path, as 
compared to the first.

James

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