I didn't realize that an octopuses brain was spread out all over its body.
We also have a nervous system distributed throughout our bodies, so we do experience the full body, but the neural signals are sent to one location, not nine. We experience ourselves as a unified hole, allowing exceptions for certain conditions.
> Although there is no direct evidence that the adaptation is linked to expanded octopus brainpower,
I.e. the entire connection between this mutation and octopus intelligence is made up. Not even a shred of justification.