Premise: She was the eldest of four children, the only girl, and "learned to exercise her native discretion, firmness, and tact" by resolving her three younger brothers' petty boyhood squabbles.
Hypothesis: She was the eldest of four children, the only girl, and "learned to exercise her native discretion, firmness, and tact" by resolving her three brothers' petty boyhood squabbles.
Relationship: entailment