The metter is not determined by the average height of the eiffel tower. The average height of the effeil tower is measured with the meter. That is the important difference. The meter is also based on constant of physics, and has a very precise definition. You can’t say the same of IQ.
In Summer the Eiffel tower is higher than in Winter. Does that mean meters are not a sound scale to measure length?
The metter is not determined by the average height of the eiffel tower. The average height of the effeil tower is measured with the meter. That is the important difference. The meter is also based on constant of physics, and has a very precise definition. You can’t say the same of IQ.