Boil it down:
Cause A => Effect B
No cause A => Still, effect B
Surprising.
Resolve the paradox: maybe there is some other cause Z?
Which of the following, if true, most
helps to explain the surprising finding?
(A)
Tidal currents do not themselves dislodge barnacles from the shells of horseshoe crabs – Doesn’t explain what thing dislodges barnacles in areas with weak currents
(B)
Barnacles most readily attach themselves to horseshoe crabs in areas where tidal currents are weakest – Against the premise
(C)
The strength of the tidal currents in a given location varies widely over the course of a day – Irrelevant
(D) A very large barnacle population can significantly decrease the
ability of a horseshoe crab to find food – Irrelevant
(E) Until they are fully grown, horseshoe crabs shed their shells and grow new ones several times a year – Resolves the paradox