Just go through idea. It will make the earth trantor.From my childhood going through sci-fi stories, i got a common character. CC, Central Computer that knows everything almost and can answer wisely...For some days i am just running with a theme... and i named it "iFriend".The theme is:" Why not to make a system that can read and learn.And i would throw it in world wide web. then let it learn.Then use it as my friend...which can talk with me, understand meand can give me exactly what i want with alternatives.."does it sound like funny or impossible? I don't think so. I like to dig deep..So far i have thought, that is..Chat robot (To define the problem) + Apache Lucene (search engine) + OLAP (to create the knowledge Base)Problem:whatever is happening in world one can define withTime,place,subject,object,objective,reason.. still studying...I am thinking of a Data warehouse with such dimensions that can define anything.. i don't know yet how much logical it is.