Interestingly, the experiment in Figure 2 was to demonstrate that action potentials could be generated from isolated neurons in buffer solution just as well as they could from an exposed neuron in situ -- so the squid still dies, but it's not tortured to death.
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Wir müssen wissen – wir werden wissen. - Epitaph of David Hilbert
We do what we want, because we can. - GLaDOS
Take your pick of rationales, it's not gonna end well for Mr. Squid.
Interestingly, the experiment in Figure 2 was to demonstrate that action potentials could be generated from isolated neurons in buffer solution just as well as they could from an exposed neuron in situ -- so the squid still dies, but it's not tortured to death.