Question 1
Argument: The new traffic light at Main Street will reduce accidents because it will control the previously dangerous intersection.
Consider the assumption: 'No other intersection changes are needed'
If we negate this assumption (assume the opposite), does it break the argument?
No — The light could still reduce accidents even if other changes help too
Negation test: If 'Other intersection changes ARE needed' then the argument 'still could hold'.
Negation test: If 'Other intersection changes ARE needed' then the argument 'still could hold'.