@Fil Albuquerque,
Not sure we're talking about the same thing. What string? Why must it be 1 dimensional, rather than say, a sort of cloud?
For me, it must be written down on our nervous system. I mean this quite literally, like a poem is written down on paper. Doesn't mean the code is straightforward, or linear, or local -- e.g. unlike computer memory, human memories don't seem to be "stored" in one discrete place in the brain, rather they can be 'reconstructed' from a number of starting points in a network -- nor that it must all be symbolic in nature. It's probably infinitely more complex than anything we can imagine right now, so I would urge against jumping to a particular code or writing system, in the absence of evidence.
But as a matter of principle, I believe our thoughts have their own causality and get "translated" or "written down" on matter somehow, e.g. when we decide to raise our arm or when we memorize something.