${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}\text{u}\text{s}\text{e}\text{s}\text{p}\text{a}\text{t}\text{t}\text{e}\text{r}\text{n}\text{s}to\text{f}\text{i}\text{n}\text{d}\text{s}\text{o}\text{l}\text{u}\text{t}\text{i}\text{o}\text{n}\text{s}\text{i}\text{n}\text{s}\text{t}\text{e}\text{a}\text{d}ofusing\text{t}\text{h}\text{e}if-\text{t}\text{h}\text{e}\text{n}-\text{e}\text{l}\text{s}\text{e}\text{r}\text{u}\text{l}\text{e}\text{s}\text{t}\text{h}\text{a}\text{t}\text{e}\text{x}\text{p}\text{e}\text{r}\text{t}\text{s}\text{y}\text{s}\text{t}\text{e}\text{m}\text{s}\text{u}\text{s}\text{e}\text{.}}$

${?}_{{?}_{?}}{?}_{{?}_{?}}{?}_u$ses patterns $to$ find solutions instead $of$ using the $if-$then$-$else rules that expert systems use.

Artificial neural networks

Virtual reality simulators

Heuristic machines

Turing machines