is it possible to digitaly copy a minidisc to a compact disc and NOT lose quality?

Answer 1

Yes
If the original is in Linear PCM then it could be copied to a CD which uses the same format.
If the original is compressed, you need to decompress it to LPCM and then record it to a CD. The LPCM quality should be as good as listening to the music from your player.

http://en.wikipedia.org/wiki/Minidisc