“10. There can be no doubt that the duty of disclosing all the primary facts relevant to the decision of the question before the assessing authority lies on the assessee. To meet a possible contention that when some account books or other evidence has been produced, there is no duty on the assessee to disclose further facts, which on due diligence, the Income Tax Officer might have discovered, the legislature has put in the Explanation, which has been set out above. In view of the Explanation, it will not be open to the assessee to say, for example — “I have produced the account books and the documents: You, the assessing officer examine them, and find out the facts necessary for your purpose: My duty is done with disclosing these account-books and the documents”. His omission to bring to the assessing authority's attention these particular items in the account books, or the particular portions of the documents, which are relevant, amount to “omission to disclose fully and truly all material facts necessary for his assessment”. Nor will he be able to contend successfully that by disclosing certain evidence, he should be deemed to have disclosed other evidence, which might have been discovered by the assessing authority if he had pursued investigation on the basis of what has been disclosed. The Explanation to the section, gives a quietus to all such contentions; and the position remains that so far as primary facts are concerned, it is the assessee's duty to disclose all of them — including particular entries in account books, particular portions of documents and documents, and other evidence, which could have been discovered by the assessing authority, from the documents and other evidence disclosed.
