First, complying with the lexical orientation of FN, frames related by inheritance are assumed not to give rise to polysemy.
rEASON is annotated only on LUs inherently indicating volitional causation, either because a subcategorization frame making the agent of the action explicit exists, as with The rain forced me to go, or simply because the LU cannot describe a non-volitional CAU-SATION, as is the case of the French connective puisque (since) (Degand and Pander Maat, 2003).