The IRS isn't above checking your phone records and credit card statements against your work log if the examiners have doubts about your business deductions.
Adding to the doubts:Your chances of undergoing a particular operation can vary vastly from one zip code to another, fluctuating by as much as tenfold.
If you are the inevitable candidate, operatives clamour to be on your team, fund-raisers stuff your coffers with gold and waverers swallow their doubts.