S.68 : Cash credit -Share capital- Manipulated accounts by way of bogus/fictitious entries, transactions did not involve actual cash inflow, it was unrealizable for assessee to discharge onus of establishing identity and creditworthiness of parties and genuineness of transaction, addition cannot be made as cash credits – maxim is “Lex non cogitadimpossibilia” – theory of impossibility of performance applied – Addition was deleted .