Truth is the foundation of all reason.
The Law Of Reason...
For something to be reasonable it must be logical and for something to be logical it must be reasonable, if these two parameters are not met then I must be both illogical and unreasonable.
This law is static, it does not change, it is the only constant, all other law is arbitrary. One cannot say that an event takes place without a reason, that would defy logic.
Therefore, to say that the universe has no reason would be illogical.