“Indeed, it is quite impossible to see how the crown, in cases of this kind, could do anything else but attempt to draw inferences. The true facts are known, presumably, if known at all, to one person only, the taxpayer himself. If once it is clear that he has not put before the tax authorities the full amount of his income, as on the quite clear inferences of fact to be made in the present case he has not, what can then be done? Of course all estimates are unsatisfactory; of course they will always be open to challenge in points of detail; and of course they may well be under-estimates rather than over-estimates as well. But what the crown has to do in such a situation is, on the known facts, to make reasonable inferences. When in para 7(b) of the case stated, the Commissioners state that (with certain exceptions) the Inspector's figures were 'fair' that is, in my judgement, precisely and exactly what they ought to be, fair. The fact that the onus is on the taxpayer to displace the assessment is not intended to give the crown carte blanche to make wild or extravagant claims. Where an inference of whatever nature falls to be made, one invariably speaks of a 'fair' inference. Where, as is the case in this matter, figures have to be inferred, what has to be made is a 'fair' inference as to what such figures may have been. The figures themselves must be fair.”
“The Tribunal considers that a prudent and reasonable taxpayer must at the very least be expected to take prudent and reasonable steps to ascertain what his or her tax obligations are.” and at Para 37 says: “An omission may be innocent, in the sense of not having been deliberate, but such an innocent omission may still be the result of a failure to take reasonable care.”