Even as I write something, do I hold the ultimate meaning. I not the same as when I started this post, the writing of the post changes me, even ignoring the multiplicity of what 'me' might mean at single instant. But if you ask me now what I meant by the start of the post, we either have to go on my thoughts on it now, and the me is changed, or my, again changed, memory of what another me might have meant, and we know the issues of memory, well I, that is what was I did mean, though my now knowing might be different and indeed must be.