Counting on from an anchor by zero gives us the anchor.
Counting on from an anchor by counting on one from the shift
equals counting on one from counting on from the anchor by the shift.
This sentence is somewhat difficult to decipher.
Counting on from the anchor x by the shift y means x+y.
Counting on from x plus counting on by one from y
counting on by one from
counting on from x by y.
Counting on has the ability to move in effect.
We have x+y’
and we move the ‘ to the whole sum (x+y)’.
However, with counting on we say counting on before the number or sum so counting on moves backwards.
x + counting on one from y
counting on one from (x+y).
So “counting on” moved from in front of the y to in front of the x+y.