Oh thank you for elucidating that. I was being a little flippant too in reflecting your comment about Heisig-sensei being "wrong". It seems really that this is a matter of how we define the word "philosophy", which obviously could be done in a variety of ways.
I would tend to take the etymology literally (philo-sophia, love of wisdom) and suggest that is something that is not wisdom in itself but could perhaps lead to wisdom - wisdom itself being inherently incommunicable (the Tao that can be spoken is not the true Tao).
However, I am sure I should be considered even wronger than Heisig-sensei from some perspectives（⌒▽⌒）
I would tend to take the etymology literally (philo-sophia, love of wisdom) and suggest that is something that is not wisdom in itself but could perhaps lead to wisdom - wisdom itself being inherently incommunicable (the Tao that can be spoken is not the true Tao).
However, I am sure I should be considered even wronger than Heisig-sensei from some perspectives（⌒▽⌒）