Many, many years ago, I was called to court, to provide testimony in a case that involved a co worker, during a weekend in question. As part of my testimony, I provided a code listing ("compilation" log), with date and time printed on each page of the listing. The testimony also required presenting of the printed "system console" log, to substantiate my testimony. I endured several hours of intense grilling, by attorneys for both sides, who examined virtually every hour of my day, to verify that the co-worker and I had been physically "at work" on that day. The code listing was but a small part of my testimony. Even then, both the judge and both attorneys were very aware of the possibility that the code listing date / time stamp could not constitute legal evidence, without careful "chain of custody" backup. Anybody knows that a computer can be easily restarted, with the system clock reset, and made to produce a "code listing" / ...