Bongard problem 104

In 1967 the Russian scientist M.M. Bongard published a book containing 100 problems. Each problem consists of 12 small boxes: six boxes on the left and six on the right. Each of the six boxes on the left conforms to a certain rule. Each box on the right contradicts this rule. Your task, of course, is to figure out the rule.

1) Numbers^*/*****

New puzzles are published at least once a month on Fridays. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars. You can check your solutions here.

Knight or knave?

The well-known explorer Kickedoutofbed arrived a his first island in the Logico archipelago. He had been warned that there were two types of natives: Knights, who always speak the truth, and knaves, who always lie.

1) knight or knave?^**/*****
He met his first native right on the beach. Of course he was curious if the native was a knight or a knave, so he asked:
“Are you a knight or a knave?”
The answer came without hesitation:
“Yes, I am.”

Which of the two types is the native?

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New puzzles are published at least twice a month on Fridays.