====Artificial Intelligence - Weak AI====

There are two fundamental types of AI - **Weak** AI (otherwise known as //rules-based AI//) and **Strong** AI (known as //machine learning//).

Don't let the word //weak// confuse you - this sort of AI is still very useful. But it's also not what people usually think of when you discuss Artificial Intelligence.

A weak AI is simply a set of rules that you apply to your inputs to arrive at the outputs.

So in our [[AI|water temperature example]], it would be very easy to construct a weak AI by simply deciding on a temperature threshold.

<wrap em>If //Temperature// > 75, then //Too Hot// should be 1, otherwise //Too Hot// should be 0.</wrap>

{{:cognition:aibasicweak.png?350|}}

===Advantages===

   * Are easy to understand
   * Are extremely consistent
   * Perform very efficiently

===Disadvantages===

   * Are based on assumptions
   * Are very inflexible
   * Need to be hand-made by people
   * Become incredibly difficult to create and maintain as complexity grows

The last two disadvantages are why the field of strong AI - machine learning - arose. 

If you imagine a [[complex ai|more complicated AI]], you'll see that hand-making individual rules for each combination of possibilities is a dauting task - and as the number of inputs increase, it quickly becomes an //impossible// task.

[[strong ai|Discover Strong AI]]