CONTRA SINGER: If we concede that sentience, coupled with the ability to experience pleasure and pain, is sufficient for moral consideration, that means, to some extents, the judgement between meal and immoral just relies on an individual’s sentience and feelings. According to Hedonism, pleasure is the primary or most important intrinsic good. If every individual pursues to maximize their happiness and pleasure, the first thing coming to their mind will be how to gain more pleasure instead of considering whether their behavior is truly wrong and may hurt others. Even though, they still deem that their behavior is morally right because the only consideration for them to make the judgment is based on their sentience. As a result, everyone will arbitrarily do the things which offer them a chance to maximize their happiness, which in case ignores others’ feelings and suffering. This will lead to a phenomenon that chasing one’s happiness increases other’s pain. Thus, ration is an additional key factor for an individual to make moral consideration.