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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
That makes no sense in any (Euclidian) Coordinate System.
"What a waste of time! Better to do nothing."
Sorry but when you play a game you have to respect the rules:-) It is not an issue! Cheers.