SMACK! You run into an invisible Wall of Force.
After you regain your senses a Sphinx on the other side
of the wall tells you to answer a riddle before you can pass.
~
"If a Phostwood tree falls in the Vesve and no one
is there to hear it, does it make a sound?"
~

A) It depends...
B) This is not a riddle.
C) I don't know.