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Yes, there are what is called necessary evils. Some may have to suffer to save many and we hope that we or anyone close to use are not the sufferers. Scientist have run this scenario on various occasions such as using animals with experiments, I believe that is evil, but it saves the lives of many including other animals, then it may be necessary.
Although one might think it can be excusable to do something bad if it has a good outcome, this leads to moral ambiguities. We can't have moral ambiguities, because then suddenly we don't have any morals at all. Something cannot be good for one reason, and bad for another. As an example, some people think it's good to lie in certain circumstances when it would be better for the other person. However, when someone lies, this lie will invariably lead to other lies. Morals need to be black and white. It can't be good to do something in one instance, and bad to do it in another.