should

This guideline is about self-references and specifies which types of self-references should be avoided and which kinds are acceptable

This guideline is about self-references and specifies which types of self-references should be avoided and which kinds are acceptable. A self-reference in an [...]

This page contains the following:Before placing templates on a page it is worthwhile to consider whether it should in fact be included in Wikipedia according to Wikipedia:What Wikipedia is not

This page contains the following:Before placing templates on a page it is worthwhile to consider whether it should in fact be included in Wikipedia according [...]

Please note: This template should be transcluded ({{WikiProject Italy}}) and not substituted (subst) because it employs conditional code

Please note: This template should be transcluded ({{WikiProject Italy}}) and not substituted (subst) because it employs conditional code. Transclusion also [...]

This {{WikiProject United States}} project banner template should be added (not subst:ed) to the talk page of articles within the scope of the project

This {{WikiProject United States}} project banner template should be added (not subst:ed) to the talk page of articles within the scope of the project. While [...]

How could Ray-Ban been comissioned by the USAF when the USAF did not exist until 1947? I believe this should be the US Army Air Corps

How could Ray-Ban been comissioned by the USAF when the USAF did not exist until 1947? I believe this should be the US Army Air Corps.—Preceding unsigned [...]