"
 Compare and contrast 

EB is a tertiary source. And it is reliable. The policy does not prohibit tertiary sources, however, if a secondary source is found EB should be removed and replaced. But not until such secondary source is added.

with

removed tertiary source per WP:RS "" may be used to give overviews or summaries, but should not be used in place of secondary sources for detailed discussion"")
  "