According to many famous practitioners and writers of Zen, Zen is not strictly a philosophy in the sense of the word.
There is something extra-logical about the nature of Zen thinking.
However, Ludwig Wittgenstein's ladder suggests you need to use senseless propositions to finally arrive at the conclusion of the senseless-ness of your original propositions.
Which gave me the idea that, even though Zen is strictly not a philosophy, you can use philosophy and logical thinking to jolt yourself into realizing the limits of logical thinking and come closer to Zen thinking.
Should questions on Zen thinking be allowed in philosophy.stackexchange?