A boat can be stiff.Logical formLearned from5 sentences. Animations can be stiff.Logical formLearned from5 sentences. Plants can be stiff.Logical formLearned from5 sentences. A (card stock) can be stiff.Logical formLearned from5 sentences. A point can be stiff.Logical formLearned from5 sentences. A soldier can be stiff.Logical formLearned from5 sentences. Ends can be stiff.Logical formLearned from5 sentences. Buttons can be stiff.Logical formLearned from5 sentences. Shocks can be stiff.Logical formLearned from5 sentences. A synthetic can be stiff.Logical formLearned from5 sentences. Ruffs can be stiff.Logical formLearned from5 sentences. A (copper wire) can be stiff.Logical formLearned from5 sentences. A conversation can be stiff.Logical formLearned from5 sentences. A (testing machine) can be stiff.Logical formLearned from5 sentences. A beat can be stiff.Logical formLearned from5 sentences.