To begin with, I never said they couldn’t walk down a slope. So I’m not sure what that comment is aimed at. Nor do I believe they did not dig the snow den. My comment was in regard to the assumption that the snow was of a consistency that it could break human bones while still being a fairly localized event, considering the fact that it certainly wouldn’t be like a large avalanche you might get in the alps where it just sweeps up anything in its path. I do not believe that they’re having to dig out a snow den, with a stick or otherwise, supports that scenario, considering everything else they had to contend with, which I listed in my post. Furthermore, whatever happened at the tent has to account for, not only the fact that they left the tent, but also for why they didn’t go back to it. Why was digging out a snow den a better alternative than simply returning to the tent? The “window” in the cedar proves that they did know where the tent was, and the only reason to climb it, which at least one of them did, is to see the tent. To be sure, if it was a slab avalanche, perceived or otherwise, they might have feared a repeat performance. We know, though, there wasn’t one. So how long would they would have waited around, underdressed and freezing, while nothing happened. Until they were so far gone with exhaustion and hypothermia that they just fell and died where they lay in a desperate attempt to get back to the tent, like what happened to Igor, Rustem, and Zina. That seems highly improbable to me.
And it is correct that it had to be outsiders or environment. But that doesn’t mean outsiders or avalanche. Nor do outsiders necessarily mean they were murdered. And, yes, process of elimination is a great way to get to the bottom of the mystery. Unfortunately, very few scenarios in this case have been eliminated. The avalanche theory has its problems the same as all theories do. That is likely because we not only are missing pieces of the puzzle, but also have pieces that are not part of the puzzle at all, and there is no way for us to know that.
I will just end by saying that I don’t personally find the avalanche theory all that compelling. But if it is the answer, then it fits the facts a lot better that Semyon and Luda’s injuries were caused by a slab avalanche at the tent rather than the den, even though there’s some logistic problems with that scenario.