Full Idea
The B-theoretic description of the world is completely adequate except that it leaves out information about which time is present.
Gist of Idea
The B-theory is adequate, except that it omits to say which time is present
Source
Theodore Sider (Four Dimensionalism [2001], 4.6)
Book Reference
Sider,Theodore: 'Four Dimensionalism' [OUP 2003], p.94
A Reaction
This strikes me as a pretty basic deficiency. How could there a time which lacked a present moment? The present is when things happen. How would it qualify as time at all if it lacked past, present and future?