1. It is possible to live a life without telling a lie, but it may be difficult to live a "normal" life. In our society, we often use white lies or half-truths to spare someone's feelings or to avoid conflict. Living a completely truthful life may require sacrifices and uncomfortable conversations. However, living a truthful life can also lead to more authentic relationships and inner peace.
2. The concept of freedom is more complex than simply being able to do what you want. It involves the ability to make choices and act on them without undue interference or coercion. While animals may act on their instincts and desires without the constraints of social and cultural norms, they do not possess the same level of self-awareness and decision-making abilities as humans. Therefore, it is debatable whether animals are truly "freer" than humans.
3. The question of whether it is ethical to kill ten people to save one is a classic example of the ethical dilemma known as the "trolley problem." There is no easy answer to this question, as it depends on one's ethical and moral beliefs. Utilitarians may argue that sacrificing ten people for the greater good of saving one is justified, while deontologists may argue that killing is never morally permissible, regardless of the circumstances. Ultimately, the decision would require careful consideration of the consequences and implications of each course of action.