A wff of which all instances are false is said to be unsatisfiable, and one with some true and some false instances is said to be contingent.
Even under this reading some of his axiom schemes have false instances, e.g., (a ⊇ b) ⊃ (a.c ⊇ b), where the dot is ordinary conjunction.
We were able to remedy these false instances by substituting abbreviations recursively into expanded forms.
FPR at score threshold t is the fraction of false instances with score ≥ t.
> -wrap-foot> Wexamineded 818 false instances of the trained similarity metric.
The FDR at a score t is the fraction of false instances among all identifications with score ≥ t.
By this approach, the meta-classifier is able to provide a more robust hypothesis, which is minimally biased by a specific choice of false instances.
We also plot receiver operator characteristic (ROC) and precision-recall curves using the reference set to determine true and false instances.
We estimate the FDR at score threshold s as FDRref = F/(T + F), the percentage of false instances that have score ≥ s.
A major hindrance to bioinformatic investigation of LM occurrences is that simple database searches do not yield significant results, while the false instances of motifs vastly outnumber the true ones.
