Here is a premise:
Rather they are assessments of how the future might unfold compared to a previously defined reference case - given a national commitment to achieve the emission reductions, and given the mix of technology and policy assumptions embodied in each of the scenarios.

Here is a hypothesis:
They are not assessments of how the future might unfold compared to a previously defined reference case, rather they are just a baseless prediction.

Here are the options: Available choices: (1). yes; (2). it is not possible to tell; (3). no;
Is it possible to conclude that if the premise is true, then so is the hypothesis?
(3).