"Falsifiable predictions" refers to statements or predictions that can be proven wrong or proven false. In other words, these are statements that can be tested or observed and have the potential to be shown as inaccurate or untrue.
Full definition
The strength of a scientific theory is related to the diversity of phenomena it can explain, which is measured by its ability to
make falsifiable predictions with respect to those phenomena.
As a matter of fact, the defining characteristic of a scientific theory is that it must be able to be disproven; i.e., it makes
falsifiable predictions (this may seem strange, but it is true).
The authors of the papers involved are to be commended for trying something new and making real and
falsifiable predictions.
I have made in this article a short - term verifiable and
falsifiable prediction about Arctic sea ice this summer.
As these problems are untractable analytically, the AGW theory stands and falls with GCMs and their ability to make
falsifiable predictions.