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Shortcuts: WP:ONESOURCE WP:1R

When one person says something to a crowd, it may in fact be true and correct, but there is nothing to back up these statements

According to Wikipedia notablity guidelines, a topic is presumed to be notable if it has received significant coverage in reliable secondary sources that are independent of the subject.

Given this information, a subject with a single source does not merit a standalone article.

There are other inherent problems with an article containing a single source.

• Copyright violations: If an article has just one source, it may be an exact copy of the source provided, therefore constituting a copyright violation.
• Original research: Any more information provided in an article beyond the lone source is automaticaly original research. It is often the writer's own interpretation of the subject or the creator's own reason there should be an article on the subject.
• Dictionary definitions:Wikipedia is not a dictionary. Therefore, an article under no circumstances can be supported only by a dictionary entry that defines the meaning of the title. If this is the case, then any other information is, by definition, original research.

[edit] Subject's own site

One of the least permissible articles are those in which the lone external link or source is the subject's own site. Not only does this have the problem with the single source issue, but is also a conflict of interest. Any company, organization, group, or individual interest has the ability to produce a web site, so therefore, one's own site cannot be used to establish notability. In some cases, information may be taken from a subject's own site after notability has been established.

An article that relies primarily on information from the subject itself should be deleted, possibly speedy deleted.

[edit] Tagging problematic articles

The template {{onesource}} can be added to the top of articles with one source. For sections, the template {{onesource|section}} can be added.