I realize no responding speech was given, so I will just comment on your proposition first speech.
I think the comparison to a human being approached by a doctor, where at least the human has the comfort to know what is going on, whereas an animal is confused and finds it more overbearing, was powerful.
You mention animals having a central nervous system. Is this the case for all animals? Most? How does this connect to consciousness (and does it need to, does it matter?). You might want to get more detailed and preempt arguments of the sort that state that without consciousness, pain sensations are just stimulus-response and are not 'felt as pain' in the same way as for humans
I like the 'other methods could solve' argument. Do these alternative methods exist for every kind of issue for which we currently do animal testing? Are these methods past r&d stages and can be widely implemented? etc - Armands Revelins on April 24, 2013 at 09:48AM EST