Adjective
untestable (comparative more untestable, superlative most untestable)
That cannot be tested; unverifiable
A well-understood and testable hypothesis like sexual selection surely trumps an untestable appeal to the inscrutable caprices of a creator. Jerry Coyne
God remains a viable hypothesis as the prime mover, however undefinable and untestable that conception may be. E. O. Wilson
Critics argued that Whorf's ideas were untestable and poorly formulated and that they were based on badly analyzed or misunderstood data. Source: Internet
Nevertheless, many physicists, mathematicians, and philosophers of science have voiced criticisms, claiming untestable predictions and a lack of serious empirical support. Source: Internet
This model has been criticized as circular and untestable. Source: Internet