This made me think about the fact that my Ataxia is progressive. So I therefore find myself determining the timing of past events by what I was able to do in my memory of the event. For instance, how much was I still able to walk unassisted? Was I seeing double yet? (It was never determined if this was a result of Ataxia, and I had strabismus surgery to correct it.) How legible was my writing? Was I still driving in the dark?