Hermeneutics

Hermeneutics is the study of the methodological principles of interpretation. Historically, it refers to bible study. Never-the-less, it seems entirely appropriate for Geophysical Estimation. If Albert's book is ``Inverse Problem Theory'' and mine is ``Inverse Problem Practice'', and if the difference between theory and practice is smaller in theory than it is in practice, then there are two fundamental questions:

1.

In theory, what is the difference between theory and practice? In theory, the difference is data error.

2.

In practice, what is the difference between theory and practice? One suggestion is that the discrepancy is entirely due to inadequate modeling. It is well known that geophysical data is highly repeatable. The problem is that the modeling neglects far too much.