No more irrational than speaking about space without time, and time without space. Take away one, you can't have the other.
This puts an interesting philosophical spin on God's existence before (if we can even say that) creation.
What's even more interesting, is God's rebuttal to this:
I am that I am
No references to space, or time.
Truly, it is profound beyond words.
In scholastic theology (Aquinas) space and time are contingent things with no absolute nature. They depend on extension and succession of being.
Then it is redundant to say you have neither.