Omnivores are often defined as opportunistic feeders, in other words; they eat what they can get their hands on. As vegetarian sources of food are generally plentiful in the developed world; are there any valid reasons for eating meat? I’m finding it extremely difficult to think of any rational reasons for eating meat in my own life since I’m entirely able to survive on vegetarian options whilst still getting the nutrients I require. The strongest ‘weak’ argument I’ve came up with is it is ‘natural’ for us to eat meat – our bodies are able, and ready, to digest it. Like I said; this argument doesn’t win me over; there are many ‘natural’ things in this world that aren’t necessary for one to live a good life (and many more to contradict living one). For example; cancer is entirely natural – it is observed in the natural world. Likewise; the process of rape as a means of propagating has been observed in the animal kingdom (i.e. in chimpanzees and even dolphins), but I would never use the ‘natural’ argument...

Suppose someone asks: "What rational arguments can be used to validate drinking wine?" You can survive without wine whilst still getting the nutrients you require (well, so they tell me). But so what? Wine is a great pleasure to the palate, it makes you feel deliciously intoxicated, it is a delight to share with family and friends. ("Wine is sure proof that God loves us and wants us to be happy", Benjamin Franklin.) What better reason for drinking the stuff? Well, maybe you don't actually like good wine (shame on you!). But assuming you do, what more "validation" do you need? Likewise, let's sit down to (say) a wonderful plate of salami, prosciutto, coppa and lardo from cinta Senese, followed by perhaps ravioli stuffed with pigeon, then a tagliatta from Val di Chiana beef ... Well, food doesn't get much better than that: it is a pleasure to the palate, it makes you feel content and deliciously replete, it is a delight to share with family and friends. What better reason for eating the stuff...

I have a daughter that is 14 years young. As a mother I understand that teenagers in her age grow up and they want to have fun, most of them with the guys. But still I can't let her go out. I think it's wrong. But my question is, Is that really wrong? Because I remember myself in her age... I also see the friends around her, they don't go out... well she's the only one. But she suffers because of me not letting her to have a boy-friend. Do you think I should let her? Because I'm really confused...

Just three quick afterthoughts, to add to Nicholas Smith's and Jyl Gentzler's wise but perhaps slightly daunting words. First, remember most teenagers do survive just fine (with a bit of a close shave here, and an emotional storm or two there): it is our burden as parents to worry far too much. So when your daughter tells you to lighten up, she's probably exactly right! Second, in any case, the big things that matter -- like your daughter's level of self-esteem, her self-confidence, how she regards men, and so on -- were shaped years ago. It's too late to do very much about them, and being over-protective won't help one bit. So the best thing you can do now is to be positive and supportive in her next phase of growing up. And third, to get back to the question originally asked: is it wrong to let her go out? Well, how could it possibly be wrong, if she's an ordinary girl wanting to do ordinary things? I can't see any compelling moral principle that has that implication. So just set some...

I have just found out today that the man I have been dating for 6 months is mildly autistic. I had no idea about this until just a few hours ago, so this realization left me shocked. I understand autism and that it is nothing like mental retardation, or anything to that extent. But still I feel like I am doing something morally wrong by continuing to date him. Should I end the relationship because it isn't fair to him, seeing as he may not fully understand his feelings or mine? Or should I continue the relationship because his autism is only mild? Please let me know what you think, I am completely torn and cannot figure out whether I am doing something horribly wrong or not.

I'm sure that you won't be doing something "horribly wrong" by continuing the relationship, if you both can acknowledge and work with your boyfriend's cast of mind. And it's hardly an uncommon situation you are in (as I'm sure many partners of male academics in the mathematical sciences could ruefully tell you!). Though the situation will probably be harder for you than your boyfriend -- for there will be occasions when his lack of ready perception of your more subtle emotional needs will, almost inevitably, be hurtful (for that is as natural reaction for you as his failures will be for him), and be upsetting however much you can explain things away as due to his mild autism. Can I add to your reading list (this is certainly one for both of you!)? Simon Baron-Cohen's The Essential Difference: Men, Women and the Extreme Male Brain is very readable and very insightful by a leading researcher into autism-spectrum conditions.

Can the well-documented placebo effect in medicine be applied to the comfort religious belief gives many? In the case of religion, should such an affect be encouraged, discouraged, or dismissed? You could argue that none of us will ever know until we die, and if we were wrong in being religious we will never know we got it wrong. If various monks or nuns in various religions (to take an extreme example of devotion) got it wrong - and some would have to have had if you subscribe to the logical view that only one religion can assure you an afterlife, what possible advice can be given? If you feel someone is wasting their life on a misguided religious quest should you just preserve silence, salute the meaning it lends their life and leave well alone? What duty do we have here, if any? Philosophers understand the points involved better than most and can see through many misconceptions in religious belief that believers are unaware of. Each-to-his-own is surely a tragic cop-out.

There is a lot of questions here. Let me pick up on just one. Suppose Jill has devoted all her energies to her family, has centred her whole life around them. And suppose her husband, unknown to her, is a serial deceiver, holding her in contempt; one child is a crooked fraudster; the other (again, still all unknown to Jill) is a wastrel and drug-addict. In this sad situation, even if her ignorance is bliss, Jill's life is not going well. The meaning she thinks she finds in her endeavours is in fact an illusion. In this case, we could hardly "salute the meaning" her devotion lends her life, for that meaning just isn't there. Yet it could still, for all that, be the right thing to leave her in ignorance -- there will be cases and cases. What is our relation to Jill? How strong is she? What would befall her if she wakes up and smells the coffee? We can't possibly give a general rule here. But even if we think we should in the particular case leave things be, we wouldn't be "leaving well alone". That...

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