Evoking a new way of thinking.
Key Vocabulary: Homology
Homology is the study of sameness -- usually sameness in
structure. In 1843, Richard Owen defined homology as "the
same organ in different animals under every variety of form and
We rely on this original definition (following the
path tread by Stephen J. Gould) and are NOT making use of the
Darwinian twist to the word (which has been perverted to imply
"from a common ancestor")
The word homology, coined in about 1656, derives
from the Greek homologos, where homo = agreeing, equivalent,
same + logos = relation.
In biology, two things are homologous if they bear
the same relationship to one another, such as a certain bone in
various forms of the "hand."
In our usage, homologies are models of similar
structures which allow for context dependence (i.e. two contexts
have some portions which can each be described via the same