inaccuracies!!
For example, they have the assassinated Medgar Evers listed as Medgar Evans. Not only disrespectful to his memory and the history, but makes it hard to have faith in this app. Seems like somebody just going off their memory part of the time. Plus, the difficulty levels seem totally arbitrary. And level one questions are not easy questions, they are giveaways.
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Trivia: Knowledge Trainer Quiz