premise: An older woman smiles on as two pink-haired women talk. hypothesis: A older women is eavesdropping on two women talking.
neutral: Just because someone smiles as two other women talk, it doesn't mean she is eavesdropping. The women could be talking loudly so that she can't help but over hear them. Just because she smiles as they talk it doesn't mean that she can hear what they are saying. She could be smiling for some other reason.