Mike: Tom did not tell me that I could use his computer, but it would not be wrong for me to use it anyway. Last week Tom used Mary' s bicycle even though she had not told him he could use it. Which one of the following principles, if valid, would most help to justify Mike's reasoning? ['Using the possessions of others without their permission is not always theft.', 'It is permissible to treat people in a way that is similar to the way in which they have treated others.', 'If people have used your property without your permission, it is not wrong for you to use their property without their permission.', 'Generally one should tell the truth, but there are cases in which it is permissible not to.']