_* If dowsing were really a learned human ability _then_ it could be controlled at will, just like any other learned human ability from bike riding to typing.
(dowsing; were really; a learned human ability _then_ it could be controlled at will, just like any other learned human ability from bike) (it; could be controlled; ) (any other learned human ability from bike; riding; )
dowsing it any other learned human ability from bike
were really could be controlled riding
a learned human ability _then_ it could be controlled at will, just like any other learned human ability from bike