(Spline curves) can be cubic.Logical formLearned from4 sentences. A curve may be closed.Logical formLearned from4 sentences. A curve may be vanished into mist.Logical formLearned from4 sentences. A curve may be formed.Logical formLearned from4 sentences. Persons may go through a curve.Logical formLearned from4 sentences. Windows can be at a beginning of an (adoption curve).Logical formLearned from4 sentences. Closed curves can be smooth.Logical formLearned from4 sentences. Information can be about curves.Logical formLearned from4 sentences. Persons may use a curve.Logical formLearned from4 sentences. A peak can be in a curve.Logical formLearned from4 sentences. A curve may shape.Logical formLearned from4 sentences. Grading may be doed on a curve.Logical formLearned from4 sentences. Areas can be under curves.Logical formLearned from4 sentences. Curves may start.Logical formLearned from4 sentences. Areas can be between curves.Logical formLearned from4 sentences.