[pturing]

> unfalsifiable (or often unmeaningful) inner states

One of the great things about Synesthesia is that it is one of those places where we have in fact been able to study some really interesting things about perception by connecting it to external objective measures.

We've been able to do this most of all with psychophysics testing, but in recent years we have also been able to connect this with genetics data and neural data via fMRI.