The Pilots are not unidirectional tires, so crossfiretech is right.

Unidirectional tires have very clear markings on the tire itself with an arrow that points in the direction of rotation.

I've had several tires that are unidirectional and they all have those markings. The arrow will point to the direction of rotation when it is at the top.

I believe with some unidirectionals, you can rotate your tires, you just have to unmount them and remount them when switching positions. These don't have the word "Outside" marked but they have the arrows.

In those cases, they are usually symmetrical thread so inside or outside works the same as long as they are spinning in the same direction. So you pop them out of the rim, flip them, pop them back in and then move the tire to the other side.