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sacmanitin
Hello Friends ,
This is a PR problem and i am satified with its reasoning for the options A to D ,but i think that option E which says
"some flying machines that were not closely modeled on birds failed to work" ,and if this is true then the conclusion
will be weaken as researchers who focus on brain's structure and ignore its structure may also fail . Please elaborate reasoning to eliminate this answer .Thanks in advance.


Dear mikemcgarry

could you please provide your comments on this. I found it should be E. as when we do yes no for this we get different answers. Please clarify
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