PT119 · S2 · Q7 Although instinct enables organisms to

Out of Scope (organisms w/ elab brains) "Elaborate brain mechanisms" is a synonym for "large number of neurons", which can prove that it is NOT an insect brain. But that's all it can prove. Insect → not large # → not flexible → no reasoning brain of neurons behavior fewer nerve cells The passage doesn't tell us that organisms with elaborate brains usually do non-instinctual things. Such organisms have the capacity for flexible behavior, but the passage gives no information about how often they actually use it. They might still do mostly instinctual things.

We were never given a rule that says brain larger than → insect's brain So we can't possibly say something that is true of all those brains. The passage tells us insects don't have enough neurons for flexibility, but it doesn't tell us all non-insect organisms with bigger-than-insect brains do. Some animals with brains larger than insects' might still fall short of the neuron threshold for flexibility.

We were never given a conditional with the trigger, organisms with large brains → So there's no way we could derive this conditional, with that trigger. The passage says flexible behavior requires a large number of neurons. Brain size and neuron count aren't identical (different species pack neurons at different densities), and the passage doesn't equate "large brain" with "many neurons" in general.

We know that organisms with brains of insect size or smaller (read: same or fewer number of neurons) engage in ONLY instinctual behavior. But this is reversing that statement and saying, The things with purely instinctual behavior are ONLY organisms with brains of insect size or smaller. The passage allows for there to be creatures like a newt (bigger than an insect) that still doesn't have enough neurons for flexible behavior, so there could be organisms bigger than an insect that only have instinctual behavior.