Yes, the pyramid shows the frequency correctly, but it also gives rise to the notion that refutation is the pinnacle of argument while name-calling is the most base of arguments.

Further, the ladder gives the false impression that in order to “reach” the better forms of argument you must begin with the lower forms. While each of us may begin with name-calling as children, we don’t progress upwards through the other stages as maturity sets in.

If you did want to make the ladder analogy apply, then perhaps you should show a ladder which descends into a sewer … one would begin at the top in the fresh clean air and with each step downwards you would be closer to the filth.

Nice graphics though, ass-hat!