The Resurrection

[Angrboda]

Here's a hypothetical to consider:

Let's suppose that a scientist installs a flow meter in an effluent pipe emptying into a lake. The flow meter says that there is a large volume of effluent coming out of the pipe. His eyes tell him that nothing is coming out of the pipe. He verifies that the flow meter is operating correctly, but still nothing is coming out of the pipe.

Should the scientists conclude:
a) that the effluent is flowing because the flow meter is correct and his eyes are wrong;
b) that the effluent isn't flowing because his eyes are right but the flow meter is wrong;
c) that the effluent both is and isn't flowing;
d) that both can't be true because contradictory things cannot both be true.

Your answer?