A (product quality) can be perceived.Logical formLearned from6 sentences. Inputs can be perceived.Logical formLearned from6 sentences. A departure can be perceived.Logical formLearned from6 sentences. A hesitation can be perceived.Logical formLearned from6 sentences. A (market failure) can be perceived.Logical formLearned from6 sentences. A perceived risk may be decreased.Logical formLearned from6 sentences. A trend can be in perceived risk.Logical formLearned from6 sentences. Perceived risk of trying inhalants may decline among graders.Logical formLearned from6 sentences. A perceived risk of harm may increase among seniors.Logical formLearned from6 sentences. Perceived risk can be in a use of marijuana.Logical formLearned from6 sentences. Perceived risk of using marijuana may decrease.Logical formLearned from6 sentences. A (missile gap) can be perceived.Logical formLearned from6 sentences. Misunderstandings can be perceived.Logical formLearned from6 sentences. An increase can be in perceived risk of harm.Logical formLearned from6 sentences. Perceived risk of use of substances may decrease among graders.Logical formLearned from6 sentences.