00436pamaa2200145 4500 0000013352 20060424090000.0 0140137831 (pbk) 153.42 DEB 1971 BF455 DEB 1971 DE BONO Practical thinking : 4 ways to be right, 5 ways to be wrong, 5 ways to understand Edward de Bono. England: Penguin Book, 1971. 188; 20 cm.. Critical thinking