If you need to discuss upsetting or controversial problems with others, using e-mail or text messaging is better than using telephone or voice-messaging.I do agree with the statement that we should use e-mail or text messaging when we are going to talk something upsetting or controversial. Because it certainly cause less potiential damage to relationship between talkers. And in most cases it make us keep a cool mind so that it is eaiser for us to solve the problems.In most relationship, whether personal or official,  sending e-mail or text messaging could do no harm to the relationship of two sides. Because the text and words in e-mail and message lead us to focus on the problems and the controversial points rather than the characters of talkers, the emothion or the faceexpressions. Those are points which may distract our attentions from problems to the relationships. Thus it may lead to worse situation . Think about couples in quarrel who are not willing to meet each other or talk to each. In this case, they would not answer the phone when seeing the name on screen. But send an e-mail or text for apologize may work out. Because it can be accepted passively, and what's the most important is that they are less emotional when reading. So they might come down and accept the apology.Then they might be as sweet as before. another situation is when we talk with our superiors something upsetting or controversial. Perhaps we clearly know that what we are going to say is not consistent with his or her values, political stands and even religious belief. If we say to him on phone or face to face, it will cause very bad impressions or bisas and misunderstandings because of emotion. Consequently the relationship between us and superiors break down.it is also hard for us to interpret our true points and postions to fix up. But if we use e-mail and text, we can control the vacabularies and sentence after deliberations and express them formally. From our common sense, the later operation is better. Admittely we know that in special case such as business negociations or discussions in class about controversial topics, we should not use e-mail or text. Under these conditions where the abundant interactions are frequently needed, it is very inconvenient and annoying to commuicate by e-mail and text, which seems rediculous. But we should notice that these situations are specific and easy to recognize. So in most cases, I agree that e-mail and text is better.