Speaking with the Mind – Neuralink [video]
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As necessary as animal testing may be (disputable) you aren't allowed to violate animal welfare laws to do it. Not to mention that violating those laws in the course of experimentation compromises the experimental validity of your results. And it's alleged that Neuralink did just that.
https://www.pcrm.org/ethical-science/animals-in-medical-rese...