1.You want a pony. You have always wanted a pony. You can buy a pony for $1000. You don’t have $1000 right now, but you can get a credit card to buy the pony with. Is this good debt, bad debt, or ugly debt? Why? 2.Ok, you want a pony, and it will cost you $1000. You don’t have $1000 right now, but you do have a business plan to giving pony rides to the kids in the neighbourhood, and your bank might lend you $1000 to start a business if you have a good plan. Is this a good debt, bad debt or ugly debt? Why?

This is considered "good debt", technically, because you are making an investment that will reap a reward later to give you not only the money to pay the debt off but to create wealth.  Like student loans, investing in a service that will create wealth.  I think all debt is bad in my humble opinion as a default.

Explanation:

as university of miami psychologists debra lieberman and adam smith pointed out in a recent article in the journal current directions in psychological science, humans have social and psychological mechanisms to deter incest. with very few exceptions, marriages between brothers and sisters and between parents and their children are verboten in every human culture. the primary psychological anti-incest mechanism is the yuck response. even the idea of sex with their mom or dad, bro or sis is upsetting to most people. the psychologist jonathan haidt has found that nearly everyone is repelled by the prospect of brother-sister sex, even in hypothetical situations in which there is no chance of pregnancy).

the biological cost of incest

this raises an interesting question: just what’s so bad about incest? sure, having sex with your dad or your sister seems gross — but why? some anthropologists have argued that incest taboos are learned social conventions. this explanation, however, doesn’t make sense to me as it does not explain the widespread existence of anti-incest mechanisms in creatures ranging from cockroaches to chimpanzees. second, the incest taboo is about as close to a universal law as human moral rules get.

why should mechanisms to avoid incest be so widespread both in nature and across human societies? the answer is simple. the problem with having sex close with relatives is that there is an astonishingly high chance that your offspring will be born with a serious birth defect.

answer; the trial de novo