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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.
I think this is a more realistic approach since getting what is false first would reduce nesting.
Why does my solution not show up after I submit it? And when I view solution it says I did not complete the challenge when clearly I solved this problem.