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IMO, Tanakasthename's complaint is addressed by the first paragraph at WP:V which explains:
The threshold for inclusion in Wikipedia is verifiability, not truth; that is, whether readers can check that material in Wikipedia has already been published by a reliable source, not whether editors think it is true.
IMO, the summary information about Ichimatsu's published works is justified by wiki-policy. One or more details may need to be "tweaked" as a result of further research, but the summary data are arguably good and sufficient as a first step in a constructive direction -- compare Wikipedia talk:WikiProject Japan#Selected works.
I wonder what others think about this? --Tenmei (talk) 18:48, 10 January 2011 (UTC)
WP:V also includes, however, several sentences later:
This policy requires that all quotations and any material challenged or likely to be challenged be attributed to a reliable, published source in the form of an inline citation, and that the source directly support the material in question.
If a source is being cited for material that is not at all supported by that source (i.e., because it is not being used/understood properly), then I see no benefit of this data being included in its current form. Tanakasthename (talk) 15:16, 11 January 2011 (UTC)