10. You must never fully rely on any one source for important information.
9. You especially can’t rely on something when you don’t even know who wrote it.
8. The contributor with an agenda often prevails.
7. Individuals with agendas sometimes have significant editing authority.
6. Sometimes “vandals” create malicious entries that go uncorrected for months.
5. There is little diversity among editors.
4. The number of active Wikipedia editors has flatlined.
3. It has become harder for casual participants to contribute.
2. Accurate contributors can be silenced.
And the number one reason you can't cite or rely on Wikipedia:
1. It says so on Wikipedia. Wikipedia says, “We do not expect you to trust us.”