Why don't good horses turn to grass? (brain teaser)

The answer is: a good horse doesn't eat grass on his back, but eats all the way, and the grass behind him is eaten by the horse.

Interpretation and analysis: This question is a brain teaser, asking "What do you mean, a good horse never turns back?" Because the conventional "good horse never looks back" means that ambitious people will never look back even if they suffer setbacks.

But brain teasers can't be solved by conventional thinking, so we can think of the problem as a way to stop horses from eating grass, and the way to stop horses from eating grass is that there is no grass, so only when the grass behind them is eaten by horses can horses stop eating grass.

Extended data:

Brainstorming problem-solving ideas need to leave the habit of thinking quickly and think about problems from other aspects when thinking encounters special obstacles. For example:

What book has the most shortcomings? The answer is: medical books.

Explanation and analysis: This is a brain teaser, in which "What book has the most questions?" The answer is to guess a number by guessing, because the mistakes in the book have two meanings, one is the mistakes in the book itself;

The second is the "faults" recorded in the book, and the second is more in line with the problem-solving idea of brain teasers, because the contents recorded in medical books are all for treating various "faults", so "medical books" have the most faults.