At the moment, I can't tell whether it's because I am tired and fail to notice the obvious or the sentence is really unusual. I've been stuck on this one for a good ten minutes including some googling with no explanation in sight, so I'm going to post this here.
This is philosophical in nature and comes from a difficult read. The original source is Defeasible Reasoning (it's a long read but search for "appeared to redly").
The whole sentence is:
If I am “appeared to redly” (have the sensory experience as of being in the presence of something red), then, Chisholm argued, I may presume that I really am in the presence of something red.
What troubles me is... what does it mean to "be appeared"? Does "I am appeared to" mean "I appear this way to others"? (So the author would mean that he appears to be red, i.e. I'd say he were red if I were to see him). I doubt this is true as this doesn't really fit with the context, but that would have been one of my first guesses. Could somebody enlighten me on this one? I could probably come up with more conjectures but I'm sure I'll just confuse myself further, waste time and make a complete fool of myself, so I'd rather ask preferably the advice of a native.