For example, if I clarify something with "definitely", or use "at all times" instead of "always", it will often react to that and suggest removing it.<p>It can be switched off, but why was this subfeature ever created? Why try to nudge away people's usage of normal synonyms, as a default behavior in MS products?
The Redmond techies who implemented Word's grammar checker probably did it with no guidance save a copy of Strunk & White's <i>The Elements of Style</i>.