&gt; plants lack a central nervous system<p>Is a CNS required for sentience? If so, why do most vegans(that I can find online) agree that it would be wrong to eat a jellyfish, which generally lacks a CNS?<p>&gt; Yes, plants respond to stimuli, in the same way a ball being rolled off a table does<p>Not even close to correct. Plants attempt to establish dominance in their domain from other plants by gathering more resources, can respond to try and protect themselves from certain types of pests&#x2F;blight&#x2F;fire, etc.