Get on, if you vant to live.         Arnold Schwarzenegger in Terminator II  There are many other words for Expiry Date, and even a symbol: Expiration Date (the worst), Use By Date, Best Before, Shelf Life, and as to the symbol, a little hourglass followed by the date. I began to reflect very soberly on these things the first time I made a casual examination of the items in my cupboard. Most foods and medication will give you up to two or three years. I’ve even speculated, with a wry smile, whether I would live that long. Several things have…