During this pod cast on knowledge and approval and mistake, we discussed the following:\n\xa0(i) the general concept of "knowledge and approval" and what amounts to such;\n(ii) the case of Hastilow v. Stobie;\n(iii) how to ordinarily establish "knowledge and approval", and what might be needed in special circumstances;\n(iv) the cases of Crerar v. Crerar, Re Phelan and Fulton v. Andrew; and\n(v) words appearing in a will by inadvertence.