Mr Brady said:trianglechoke7 said:Mr Brady said:Is obvious that the core is meant to move, or else the ribs would just connect to the hips.
Why do pandas have "thumbs" the way they do?
In either case, the panda's thumb is a contrivance that is an artifact of the history of the panda. It is not an ideal design fitted perfectly for holding bamboo, it is an evolved contraption. The original function of the radial sesamoid was to reduce the chance of tears in the tendon that runs to the thumb from a muscle in the arm (the sesamoid forms where this tendon bends around the edge of the wrist). The radial sesamoid was then co-opted to serve its present role in handling bamboo. Indeed, much of the panda's anatomy speaks of contrivance - it is a bear from a meat eating ancestry that has evolved to eat bamboo. Many details of its anatomy appear to be strange contrivances that reflect this history.I think this evolutionary argument might go too far when inferring that the mid-section shouldn't move because we weren't designed to stand upright.
We have the bodies we have, not the best design possible for carrying load, but the evolutionary argument would make me think that there should be more powerful mobility in the mid section, after all that's part of how how four legged animals develop thrust, dynamically loading and unloading the spine, flexion and extension.
I guess I didn't make my point well.
What I was trying to say is that you can't necessarily say, "x body part can do y, therefore we should do y" because evolution does not "mean", as you stated, to do anything.
The design of the human mind is such that we commit systemic errors on a variety of subjects. So I could say, "Obviously we are meant to commit these errors, or else our minds would be different," and furthermore insist that trying to correct for these errors is not beneficial.
Would you agree that we should not try to correct our cognitive biases since we are made that way?