Yellow Light – Used as a metaphor in describing how free will can be compatible with determinism and incompatible at the same time. In a traffic light, the red and green signals are taken to issue an unambiguously deterministic command. The yellow light points to the driver to use their own awareness and judgment. The yellow light is really a meta-signal that relates to the status of the what the signal is going to do. In the same way, our will allows us to try to inject more freedom to reinterpret signals and create unprecedented intentional effects.