 As a possible response to the difficulties above, naïve HD can be enriched by the use-novelty criterion (UN) instead. The UN reaction to the underdetermination problem is more conservative than the temporal predictivist strategy. According to this view, to improve on the weak naïve HD clause for confirmation one only has to rule out one particular class of cases, i.e., those in which the description of a known fact, \(e\), served as a constraint in the construction of \(h\wedge k\). The UN view thus comes equipped with a rationale. If \(h\wedge k\) was shaped on the basis of \(e\), UN advocates point out, then it was bound to get that state of affairs right; the theory never ran any risk of failure, thus did not achieve any particularly significant success either. Precisely in these cases, and just for this reason, the evidence \(e\) must not be double-counted: by using it for the construction of the theory, its confirmational power becomes “dried out”, so to speak.