A hike can be rugged.Logical formLearned from19 sentences. Beaches can be rugged.Logical formLearned from19 sentences. Materials can be rugged.Logical formLearned from19 sentences. An outpost can be rugged.Logical formLearned from19 sentences. A hinterland can be rugged.Logical formLearned from19 sentences. Strongholds can be in rugged mountains.Logical formLearned from19 sentences. A (crash site) can be rugged.Logical formLearned from19 sentences. An encounter can be rugged.Logical formLearned from19 sentences. (Mountain areas) can be rugged.Logical formLearned from18 sentences. Headlands can be rugged.Logical formLearned from18 sentences. A slope can be rugged.Logical formLearned from18 sentences. A male may look rugged.Logical formLearned from18 sentences. Coasts can be rugged.Logical formLearned from18 sentences. Terrain can be rugged.Logical formLearned from18 sentences. A capability can be rugged.Logical formLearned from18 sentences.