A method of deducing the correct species
assignment of a living thing is known as dichotomous key, which is also called
identification key. It works by requiring a user to choose two alternatives at
each step and the choice of one alternatives give the name of the organism or
direct further down in the key. However, a common error in using dichotomous
key is the assumption that the correct name or identification of the organism
is even included in the set of key. Therefore, this method alone is not reliable
to identify specific species.
