Answering questions like these is of paramount importance to vast numbers of living beings. But none of these questions are answerable through the most rigorous application of scientific method. The issue of who has the answers to the questions that most trouble us can be resolved without major dispute, if we remember to address the questions to the appropriate department. We have talked a lot about knowledge, facts, principles and values. So much for knowledge.
Nonsense can be something so senseless as to be laughable.
That's fine, if its purpose is simply to amuse. Sometimes nonsense can illuminate social or political foolishness, like Lewis Carroll's Through the Looking Glass or Alice in Wonderland, the laughable nonsense with which Gilbert and Sullivan lampoon the English class system, and the zany antics of Groucho Marx as Dr. Hugo Hackenbush, demolishing the pomposity of the medical profession. But nonsense, posing as serious thought, can also mean absurd, foolish, silly, insane or preposterous pronouncements. Yes, there are abundant examples of nonsense in the cause of vegetarian advocacy, as there inevitably are in any cause that seeks to persuade people to think or act in new or unconventional ways. I have had an abortion.