That's not due to counting "in decimal", it's because of counting in unary: using the number of fingers to represent a number (possible to count from 0 to 10, i

That's not due to counting "in decimal", it's because of counting in unary: using the number of fingers to represent a number (possible to count from 0 to 10, inclusive), rather than having each finger represent a digit in a number (possible to count from 0 to 1,023 inclusive, in binary). This was hilarious to write if you're into puns, since the collision between "digit" as in "part of hand" and "part of number" hit me in the face.