I know I have asked this question before, but that was on a general level. Now, since I couldn't get a good answer there, I'm forced to ask on a specific instance.
Why isn't there a taxonomic distinction between clean and unclean birds?
At what point does a question moves past the line from interpretation into doctrine?
My gut is telling me that this has crossed that line, but I can't really identify the line, so I can't do much more than raise the question to you, the community.
Is asking whether something is kosher a question about application (ie doctrine) or a question about interpretation? Since we have no good guidelines, is this too far into the area of doctrine?