Question 1
Argument: The new traffic light at Main Street will reduce accidents because it will control the previously dangerous intersection.
Consider the assumption: 'The intersection currently has accidents'
If we negate this assumption (assume the opposite), does it break the argument?
No — Could still prevent future accidents even if none currently
Negation test: If 'The intersection has NO accidents currently' then the argument 'still could hold'.
Negation test: If 'The intersection has NO accidents currently' then the argument 'still could hold'.