Scilla and Charibdis belongs to Homer's Odissey. Odisseus conducts his vessel back home, and has to cross a strait with a monster at each side. One of them is a creature that will eat six sailors, another produces a maelstrom able to sink any boat. Circe told Oddiseus:

"At that point I shall no longer tell you fully on which side your curse should lie, but you must decide it in your own heart"

So it is that Scilla and Charibdis is synonymous of decision making. Understanding nature is also about decision making. At any moment we are faced with possibilities, hypothesis, alternative descriptions. Statistics helps along the process. Continuously developed techniques assign uncertainty values to different options. But the decision, alas, is always in the heart of the researcher.