I have a different take on the whole thing. 0/0 is defined. It's indeterminate. It can be any value you want.

If 0 / 0 = d

then

0 = 0 * d

Which is true for every single value of d.

d can be 1, 2, 100, 10^100, Thomas, Ben Stokes, i, a quaternion, a spinor, a twistor. a Wheel - you get the idea.

So never say 0/0 is not defined.

It is defined.

As indeterminate.

(Check out Indeterminate Forms under Calculus I under Limits and Continuity to know more)

Thanks for reading!