The market is underestimating these artificial intelligence stocks.Warren Buffett has written annual letters to Berkshire Hathaway shareholders for nearly six decades. Investors looking for a treasure trove of timeless financial advice should consider reading them. The following quote comes from the 1996 shareholder letter, but it remains perfectly relevant today."Your goal as an investor should simply be to purchase, at a rational price, a part interest in an easily understandable business whose earnings a ...