Since I'm not a local speaker, I would like to ask for the help with the ELL Group. Will be the expression "a damning problem" neutral sufficient to work with it in a tutorial context? Everything you're asking for is a expression to "mark" an "unmarked" class, which is usually https://petskyonline.com/blog/why-tofu-cat-litter-is-gaining-popularity-in-the-uae/