(Although Donald Rumsfeld was mocked for talking about "known unknowns" and "unknown unknowns", I think it's an truly important distinction.)
Periodically, I hear about how the universe might be in a metastable false vacuum and how we might all be toast because of it. But I also realize that there are a lot of known unknowns out there; e.g. we know that normal matter makes up only ~5% of the universe, and we don't really know what's going on with the remaining 95%. That's an example of a known unknown.
If I understand correctly, the calculations to determine if we are in a false vacuum are all based on the standard model of particle physics. However, we also know that the standard model is incomplete. Are there any "known unknowns" about the standard model's limitations that could affect the possibility of a false vacuum?
I realize that there are error bars on the mass of the top quark and higgs boson, and we need to know them to determine if we are in a false vacuum; thus, the exact values of those masses is a known unknown, but that's not what I'm asking about. I'm talking about the possible effect of known, fundamental holes in the standard model.