You’re in a boat with a rock, on a fresh-water lake. You throw the rock into the lake. With respect to the land, what happens to the level of the water in the lake – goes up, goes down, stays the same? There are several test cases, the boat is mired in muck before/after release(after), boat is mired in muck before(before) not after release, or the boat is floating(float) and the rock floats(floats), the rock sinks(sinks) or the rock gets mired in muck(muck). So you have: after/floats water level rises because more water is displaced. after/sinks water level rises because more water is displaced. after/muck water level rises because more water is displaced. before/floats water level rises because more water is displaced. before/sinks water level lowers because less water is displaced. before/muck Indeterminate conclusion, need more information about the state of water displacement. float/floats water level stays the same because the same amount of water is displaced. float/sinks water level lowers because less water is displaced. float/muck Indeterminate conclusion, need more information about the state of water displacement.
Based on an equal probability of all test cases, most likely the water will rise. (I need a $2.3 million grant from the government to finish studying this problem.:)