I've traced the origin of one of the disputed sentences myself. It seems the problem stems from multiple users whose first language is not English, who don't understand the need for sources, and who can't edit in accordance with WP:NPOV. 

At 20:18 July 23  adds: "Ishihara stated he respects the French culture but he just pointed out the problem of French language." POV, poor English, unsourced, and meaningless: what's the problem with the French language that causes problems for mathematicians? (Some of the world's best mathematicians are French.)
At 19:45, August 2, , who seems to be French, changes it to: "Ishihara stated he respects the French culture but he just pointed out his ignorance about french mathematicians and his stupidity." POV, poor English, unencyclopedic, insulting, unsourced.
At 00:02, August 11,  changes it to: "Ishihara then apologized by stating his apreciation for the French culture." Unsourced and contains a spelling mistake (possibly just a typo).
At 02:15, August 17, User:Hmib reverts to: "Ishihara stated he respects the French culture but he just pointed out his ignorance about french mathematicians and his stupidity." See above.

Perhaps the dispute between FoC and Hmib could be reduced if you were both to supply sources for every edit that's likely to be challenged. Also, please bear in mind that this is the English Wikipedia, and edits must conform to a minimal standard of English. This is especially true when the edits are contentious and are leading to weeks-long edit wars. I'm leaving this on FoC's page too.  (talk) 21:49, August 21, 2005 (UTC)