Denny, here is today's Cassini news release. Note how models and studies yield conclusions that were not directly measured on and under Titan's surface. Indirect observation is what science is all about. By your standards, a human you trust (probably Bush himself) would have to taste a billion sample spots before science could conclude that the ocean is salty.
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Scientists
analyzing data from NASA’s Cassini mission have
firm evidence the ocean inside Saturn's largest moon, Titan, might be as salty as the Earth's Dead Sea.
The new results come from a
study of gravity and topography data collected during Cassini's
repeated flybys of Titan during the past 10 years. Using the Cassini data, researchers presented a
model structure for Titan...
Additional findings
support previous indications the moon's icy shell is rigid and in the process of freezing solid. Researchers found that a relatively high
density was required for Titan's ocean
in order to explain the gravity data. This
indicates the ocean is probably an extremely salty brine of water mixed with dissolved salts likely composed of sulfur, sodium and potassium. The density
indicated for this brine would give the ocean a salt content roughly equal to the saltiest bodies of water on Earth...
Cassini data also
indicate the thickness of Titan's ice crust varies slightly from place to place. The researchers said this can
best be explained if the moon's outer shell is stiff,
as would be the case if the ocean were slowly crystalizing, and turning to ice.
Otherwise, the moon's shape
would tend to even itself out over time, like warm candle wax. This freezing process
would have important implications for the habitability of Titan's ocean, as it would limit the ability of materials to exchange between the surface and the ocean.
A further consequence of a rigid ice shell, according to the study, is any outgassing of methane into Titan's atmosphere
must happen at scattered "hot spots," like the hot spot on Earth that gave rise to the Hawaiian Island chain. Titan's methane
does not appear to result from convection or plate tectonics recycling its ice shell...
http://www.nasa.gov/press/2014/july/ocean-on-saturn-moon-could-be-as-salty-as-the-dead-sea/