Someday, susan would like to participate in a marathon. even though she has been an avid long-distance runner for many years, susan has always been reluctant to sign up for a full marathon because she is usually about 10 pounds overweight. while watching a recent marathon in her city, susan noticed that a significant number of the participants were also somewhat overweight. despite their extra pounds, these runners completed the marathon and did so in a respectable amount of time. after seeing this, susan has decided to go ahead and begin training for her own marathon. this scenario provides an example of:

Why have the aztec ruins in mexico city not been dug up?

“dear sir: it is with great reluctance, i trouble you on a subject, which does not fall within your province; but it is a subject that occasions me more distress, than i have felt, since the commencement of the war; and which loudly demands the most zealous exertions of every person of weight and authority, who is interested in the success of our affairs. i mean the present dreadful situation of the army for want of provisions, and the miserable prospects before us, with respect to futurity. it is more alarming than you will probably conceive, for, to form a just idea, it were necessary to be on the spot. for some days past, there has been little less, than a famine in camp. a part of the army has been a week, without any kind of flesh, and the rest for three or four days. naked and starving as they are, we cannot enough admire the incomparable patience and fidelity of the soldiery, that they have not been ere this excited by their sufferings, to a general mutiny or dispersion. strong symptoms, however, discontent have appeared in particular instances; and nothing but the most acitive efforts every where can long avert so shocking a catastrophe.” what’s the central idea?

Imagine you are driving down the highway and reading a sign that states save the planet don't litter which technique of policy enactment is being used