根据OG12上说“Does the information provided by the first statement enable you to answer the question?“,
sufficient是enable to answer的意思。 - 对一般疑问句的问题,能回答no也算sufficient。 - 对特殊疑问句的问题,sufficient指有且只有唯一解。 OG12说For example, if the question asks, “What is the value of y ?” for an answer statement to be sufficient, you must be able to find one and only one value for y.