# I Why String Theory Is Still Not Even Wrong

1. May 18, 2017

### haushofer

No. It also works in 2+1 dimensions due to proporties of the Lorentz group in 2+1 dimensions. See e.g. Paul Townsend.

2. May 21, 2017

### craigi

It's hard to know what an experiment could even be like to observe hidden dimensions directly. To answer that, first we need to address what we mean by direct measurement. When we examine at all the measuring apparatus we use for what we consider direct measurement, it all involves conveying information using 3 spatial dimensions and/or 1 time dimension.

Would we expect to be able to perform an experiment which projects spatial detection within hidden dimensions into 3+1 space? Is that what we would consider direct measurement? If so how would we probe in these dimensions and then project into 3+1 space?

Last edited: May 21, 2017