(IDK anything about the underlying contingent facts, but:
there’s a large relative difference between .967 and .98; almost half as much distance to 1. If exposure is really bad, this difference could matter.
If there’s a damage repair mechanism with something like a rate of repair, that mechanism can either be overwhelmed or not overwhelmed by incoming damage—it’s an almost discrete threshold.
)
For sure, but that leads to much more individualised advice of the form “If you’re fine to be exposed to sun for up to 2h with SPF 50, you should not expose yourself for much more than 1h with SPF 30”. The quoted section makes it seem like “You’re fine as long as you wear SPF 50+ sunscreen, but SPF 45 just won’t cut it.”, which doesn’t generalise for most individuals and their level of sunlight exposure.
(IDK anything about the underlying contingent facts, but:
there’s a large relative difference between .967 and .98; almost half as much distance to 1. If exposure is really bad, this difference could matter.
If there’s a damage repair mechanism with something like a rate of repair, that mechanism can either be overwhelmed or not overwhelmed by incoming damage—it’s an almost discrete threshold. )
For sure, but that leads to much more individualised advice of the form “If you’re fine to be exposed to sun for up to 2h with SPF 50, you should not expose yourself for much more than 1h with SPF 30”. The quoted section makes it seem like “You’re fine as long as you wear SPF 50+ sunscreen, but SPF 45 just won’t cut it.”, which doesn’t generalise for most individuals and their level of sunlight exposure.