It really depends on how you are planning to use the intent. You need to put enough variations to remove doubt and allow for variations so the service can obtain high certainty for the intent that you intended.
If you only train it with "what is", then the question "what is Phising?" could get confused with questions like "what is a good strategy against Phising?"
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…