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Training set X = A ∪ B ∪ C ∪ D. Two scoring functions are defined, and a linear combination of them can produce the ideal order of the probability of +1 labels.
| Subset | A | B | C | D |
|---|---|---|---|---|
| +1 labels | 0 | 20 | 20 | 80 |
| Score s1 | s1= 0 | s1= 1 | s1 = 0 | s1 = 1 |
| Score s2 | s2= 0 | s2= 0 | s2 = 1 | s2 = 1 |
