To you, what is the difference between 'I have no idea whatsoever what you are talking about' and 'I have no idea what you are talking about' ? To me "whatsoever" is stressing "what", so is a stronger statement . Further more, is it more formal to include the conjuction or pronoun that in a sentences like these, 'I can't find the book that I borrowed from the library' and 'she said that she is going to the beach' ?
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