From Civstats I would say it is pretty much obvious that Gandhi build the Oracle. Score drop from 138 to 126 right before the end of turn and then score rise to 166 gives it away quite nicely. What I really would like to know though is what technology did they select. Since no new religions were found I would assume Metal Casting. Anything with less beakers makes really no sense and it would give them a nice opportunity to build the Colossus way before anyone else.