Answer:
For sure negative:
bony, pole, skeletal, skinny, stick, undernourished, underweight
Don't know or am unsure about:
beanpole and beanstalk
The rest are positive unless you think otherwise
Explanation:
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He gives a reason for this that from innocence the forefathers "grew" their safety rather than by "power and genius" perhaps meaning that having a good heart and meaning well for other people results in more "safety" in life than "power and genius" which brings to mind the demise of Conrad Black who sought Power and Genius I would say (perhaps as an addiction to power) that it led him to break the law and end up in jail.
Trivial details are details that have little to no relation to the evidence you are supporting. Supporting details back up you evidence strongly. Trivial details will often be used to keep the audience interested (ex: A fun fact about the moon.)
Hope this helps!