I.J$.$ Good $($and others$)$ make the claim that intelligence is the most im$-$ portant quality, and that building ultraintelligent machines will change everything. A sentient cheetah counters that $$Actually speed is more important; if we could build ultrafast machines, that would change everything,$$ and a sentient elephant claims $$You$$re both wrong; what we need is ultrastrong machines.$$ What do you think of these arguments?