Question

This hypothesis [separation of powers] supposes human wisdom competent [capable] to the task of instituting three co-equal orders in government. . . . Mr. Adams . . . has not been able to adduce [find] a single instance of such a government. . . . If such an organization of power were practicable [able to be used], how long would it continue? Not a day.
Which statement supports the author’s main claim?
Responses

It is likely that the government will function successfully by separating powers.
It is likely that the government will function successfully by separating powers.

Past governments have created separate powers on many occasions.
Past governments have created separate powers on many occasions.

Humans are capable of creating a fair system using separate powers.
Humans are capable of creating a fair system using separate powers.

A government of three branches with equal powers does not exist anywhere else.
A government of three branches with equal powers does not exist anywhere else.

Answer 1

"A government of three branches with equal powers does not exist anywhere else."

This supports the author's main claim that instituting three co-equal orders is impracticable, since no example can be found.