Is the query for an existing author archive page?

Is the query for an existing category archive page?

Is the query for a comments feed?

Whether the current URL is within the comments popup window.

Is the query for an existing date archive?

Is the query for an existing day archive?

Is the query for a feed?

Is the query for the front page of the site?

Is the query for the blog homepage?

Is the query for an existing month archive?