Wikipedia is not a reputable encyclopedia because its information is prone to changes from malicious or unprofessional people. It is susceptible to errors because anyone can edit its content. Therefore, people can add incorrect information, with no editors available to check posted articles.
Nonetheless, not all the information from Wikipedia is incorrect. It provides an overview of information that may be useful while familiarizing oneself with a topic. Users should still be cautious because Wikipedia may contain outdated or mistaken information. It is not acceptable as a reference in academic research because the expertise of the information is not guaranteed.