Various inaccurate or simply wrong claims in the text make it an unreliable source.

Another similarly unreliable source counts 50.000 volumes or fewer for the year 1839.

Wind may be considered an unreliable source of electricity due to its intermittent nature.

The slow-growing nature of the fungus (7-10 years minimum) and because it can not be cultivated without losing most of its properties make this an unreliable source, though.

His many critics say he has turned from the evidence-based reporting that made him famous towards unsubstantiated conspiracies based on unreliable sources.