Answer Engines vs. Search Engines

My recent article about Wolfram Alpha has created quite a stir on the blogosphere (Note: For those who haven't used Techmeme before: just move your mouse over the "discussion" links under the Techmeme headline and expand to see references to related responses)

But while the response from most was quite positive and hopeful, some writers jumped to conclusions, went snarky, or entirely missed the point.

For example some articles such as this one by Jon Stokes at Ars Technica, quickly veered into refuting points that I in fact never made (Stokes seems to have not actually read my article in full before blogging his reply perhaps, or maybe he did read it but simply missed my point).

Other articles such as this one by Saul Hansell of the New York Times' Bits blog, focused on the business questions -- again a topic that I did not address in my article. My article was about the technology, not the company or the business opportunity.

The most common misconception in the articles that misesd the point concerns whether Wolfram Alpha is a "Google killer."

In fact I was very careful in the title of my article, and the content, to make the distinction between Wolfram Alpha and Google. And I tried to make it clear that Wolfram Alpha is not designed to be a "Google killer." It has a very different purpose: it doesn't compete with Google for general document retreival, instead it answers factual questions.

Wolfram Alpha is an "answer engine" not a search engine.

Answer engines are different category of tool from search engines. They understand and answer questions -- they don't simply retrieve documents. (Note: in fact, Wolfram Alpha doesn't merely answer questions, it also helps users to explore knowledge and data visually and can even open up new questions)

Of course Wolfram Alpha is not alone in making a system that can answer questions. This has been a longstanding dream of computer scientists, artificial intelligence theorists, and even a few brave entrepreneurs in the past.

Google has also been working on answering questions that are typed directly into their search box. For example, type a geography question or even "what time is it in Italy" into the Google search box and you will get a direct answer. But the reasoning and computational capabilities of Google's "answer engine" features are primitive compared to what Wolfram Alpha does.

For example, the Google search box does not compute answers to calculus problems, or tell you what phase the moon will be in on a certain future date, or tell you the distance from San Francisco to Ulan Bator, Mongolia.

Many questions can or might be answered by Google, using simple database lookup, provided that Google already has the answers in its index or databases. But there are many questions that Google does not yet find or store the answers to efficiently. And there always will be.

Google's search box provides some answers to common computational questions (perhaps via looking them up in a big database in some cases, or perhaps by computing the answers in other cases). But so far it has limited range. Of course the folks at Google could work more on this. They have the resources if they want to. But they are far behind Wolfram Alpha, and others (for example, the START project, which I recently learned about today, True Knowledge and Cyc project, among many others).

The approach taken by Wolfram Alpha -- and others working on "answer engines" is not to build the world's largest database of answers but rather to build a system that can compute answers to unanticipated questions. Google has built a system that can retrieve any document on the Web. Wolfram Alpha is designed to be a system that can answer any factual question in the world.

Of course, if the Wolfram Alpha people are clever (and they are), they will probably design their system to also leverage databases of known answers whenever they can, and to also store any new answers they compute to save the trouble of re-computing them if asked again in the future. But they are fundamentally not making a database lookup oriented service. They are making a computation oriented service.

Answer engines do not compete with search engines, but some search engines (such as Google) may compete with answer engines. Time will tell if search engine leaders like Google will put enough resources into this area of functionality to dominate it, or whether they will simply team up with the likes of Wolfram and/or others who have put a lot more time into this problem already.

In any case, Wolfram Alpha is not a "Google killer." It wasn't designed to be one. It does however answer useful questions -- and everyone has questions. There is an opportunity to get a lot of traffic, depending on things that still need some thought (such as branding, for starters). The opportunity is there, although we don't yet know whether Wolfram Alpha will win it. I think it certainly has all the hallmarks of a strong contender at least.