Rainsford hears something and listens but falls off the boat. He then ends off at a castle and were hes greeted by Ivan, the servant. So then comes general Zoroff, greeting Rainsford in and inviting him to eat with Zoroff. But the weird part is that Zoroff keeps staring at Rainsford. So while there're eating the General talks about this new creature hes been hunting, but he keeps it substanceful.
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There's also the effect of war. The general is a hunter that went to war. When he came back to the real world hunting animals didn't satisfy him anymore. He thought he needed an animal with logic and after going to war he knew humans were the perfect creatures. Killing humans didn't affect him anyways, this is how the affects of wars affected the general.
You need instinct and logic to survive. For example Rainsford uses both method to survive the three days of the challenge. He didn't attack the General when he could've done so.