1. Statement: Never before such a lucid book was available on the topic. Assumptions: Some other books were available on this topic. You can write lucid books on very few topics.
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By: guest on 02 Jun 2017 01.29 am
It follows from the statement that books on this topic were available before also but they were not 'lucid'. So, I is implicit. But a general comment as II cannot be made from the given statement. So, II is not implicit.