four ways. To illustrate, take the head “profits and gains of business, profession or vocation”. An assessee may have two businesses. In ascertaining the income in each of the two businesses, he is entitled to deduct the losses incurred in respect of each of the said businesses. So calculated, if he has loss in one business and profit in the other both falling under the same head, he can set off the loss in one against the profit in the other in arriving at the income under that head. Even so, he may still sustain loss under the same head. He can then set off the loss under the head “business” against profits under another head, say “income from investments”, even if investments are not part of the trading assets of the business. Notwithstanding this process he may still incur loss in his business. Section 24(2) says that in that event he can carry forward the loss to the subsequent year or years and set off the said loss against the profit in the business. Be it noted that clause (2)