Ed Pawlowski wrote:

They can and do think of everything. Just as the Titanic is
unsinkable, every engineering possibility will be considered.

As long as humans engineer and build things, they will continue to
break.

Limited thinking.

The RMS Britannic, sister ship to the Titanic, struck a mine on 21 December
1916 and sank. There was NOTHING the Britannic's naval architects could have
done to prevent the perfidy of a hostile belligerent.

The BP platform fire and resulting oil spill could have been way beyond the
rig designer's portfolio.

For example, if a surfacing U.S. submarine could hit a Japanese yacht in the
middle of the Pacific (sinking the boat and killing all aboard), a
submarine - either U.S., another nation's, or a drug smuggler's - could have
collided with an oil platform in the considerably more crowded Gulf of
Mexico.

Bizarre? Sure. Improbable? To the extreme. But until we get more facts, it's
premature to conclude design oversight, mechanical failure, or human
incompetence.