By Dan Weil He cites a strong economy, low unemployment, rising wages and the beginning of Fed interest-rate increases. Money management legend Bill Miller, chief investment officer of Miller Value Partners, says there are a lot of unanswerable questions in the stock market. No one knows when the Russia/Ukraine war will end, how high inflation will go and how many times the Federal Reserve will raise interest rates. No one knows whether the stock market rally that began last week will continue, Miller wrote in a commentary. The S&P 500 has slid 6.2% year to date, but the market rebounded 8% fr…