Theoretically, MultiEA, by virtue that it is just another EA, will
still be under the no free lunch (NFL) theorems [20]. There are
likely to be situations that MultiEA gets a bad result. However,
the premise of the NFL is that all computable problems are
equally likely to occur. It is hardly the case in the real world. In
fact, the promise of multi-method search is that by using many
search metaphor inspired by nature, mathematics, sciences, arts,
etc., one would build up better search strategies that are more able
to deal with real world problems. It may perhaps be likened to
synergy of individuals with different talents in a heterogeneous
society.