According to quantum mechanics, nothing at the subatomic scale can really be said to exist until it is observed. Until then, particles occupy nebulous "superposition" states, in which they can have simultaneous "up" and "down" spins, or appear to be in different places at the same time.
Observation appears to "nail down" a particular state of reality, in the same way as a spinning coin can only be said to be in a "heads" or "tails" state once it is caught.
According to quantum mechanics, unobserved particles are described by "wave functions" representing a set of multiple "probable" states. When an observer makes a measurement, the particle then settles down into one of these multiple options.
Ok...tie together the 10th Dimension theory and the idea we are in a "reality" that may just be a great big program, then inject quantum mechanics for "probability" based reality and what do you get?
You'd have to be very foolish not to see it...oh, wait a minute...
Some additional reading: