“Put any group of 20 architects in a room and ask them to choose the buildings in their city that are of special significance, and I’ll wager no two lists will be alike. But when that opinionated mob is also the board of directors of the local chapter of the American Institute of Architects, its verdict is delivered with a certain gravitas. So say hello to the semiofficial list of San Francisco’s top 25 buildings…. And let the second-guessing begin.”