Not in this direct line of software of the encrypt multiple documents and only out 1 based on pass-phrase, this would be unique (as far as I can tell).
True crypt tells you how to set this up, but not do this automatically. Also it would require you selecting which volume, not just "insert password get document"
This would offer a higher degree of plausible-deniablity, and portability, by making it a file its not tied to one location. The structure of the file, and multiple hashes also grant plausable deniability why you can't just decrypt the entire file in one go and compare the 2 documents SHA hashes.
Would it stand up in court? No. It would help avoid less tech savvy people.
