Board Thread:General Discussion/@comment-3182821-20160526105408

So, we have an anonymous editor who's absolutely sure Cori and Tant are mates, not twins. I know there's so little canon in Cats, especially when it comes to relationships, but I thought this was one of the few definites - the two identical, perfectly in sync, mystic twins are actually twins?

I suppose it does depend on production... the Japanese production obviously plays it differently, with Cassandra and Tumblebrutus not always identical, although they're the tracks that typically take the "twins" roles.

Basically, I'm opening for discussion/information, do we have sources for the Twins being twins? Is there enough canon to say that no, the twins are indeed twins not mates?  