Page 491 - Makino,Tsutusi.DictionaryOfIntermediateJGrammar
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In. Sore ni is similar to sono ue except that the added statement is not
emphatic. Thus, this statement is often supplementary information. In
the following examples, [3a] and [3b] are acceptable but [4a] and [4b]
are somewhat unnatural. The reason is that in [3a] and [3b] the second
statements are not necessarily emphatic while in [4a] and [4b] the
second statements are emphatic as the emphatic marker made shows.
