Humans typically have two hands, each of which has five digits. Among the digits, the thumb sticks out as being different. Its major orientation of motion is perpendicular to the four fingers. Next to the thumb is the index finger, and then in sequential order are the middle finger, the ring finger, and the little finger. In Lakotan language, “napakaza” is the word for the five fingers of a hand. The thumb is “napahunka,” and in sequence the others are “waepazo,” “napchokanyan,” “shashte iyokihe,” and “shashte.” Given human beings’ two hands, each with five digits, it is understandable that a...

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