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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.
If I understand what you are asking then if I've owned the cat for < 15 catYears, or the dog for < 15 dogYears, then I have not yet owned them even for one full human year. Maybe I've just owned them for 0.75 human years (or whatever)...
The Kata says "Results are truncated whole numbers of human years", therefore anything < 1 will be expecting 0.
Make sense?
14?