I think is yes because if they never occurred than no one would discovered or have those things they will have to try to make them by themselves
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Before secession, there were 11 states in the United States of America. This is in the 1860's btw
Answer:
Snickers or skittles to me
An amendment can be proposed by either a two-thirds vote of both houses of Congress or by a constitutional convention called by Congress at the request of the legislatures in two-thirds of the states. The constitutional convention method has never been used to propose an amendment.
Tell me if you need more info :)