You would have to find a synesthete with the same sensory cross-over to you, and hope you have a similar mapping of the senses, right? Aren't the mappings at le

You would have to find a synesthete with the same sensory cross-over to you, and hope you have a similar mapping of the senses, right? Aren't the mappings at least semi-individualistic? E.g. Person A sees red when looking at the number 42, Person B sees blue.