On this question on symbolic matrix block inversion, the matrix tag is used.
Typically in Mathematica literature references are made to Lists rather than Matrices. Matrices are just lists of lists after all.
What do you think of having matrix as a synonym for list and using list as the preferred form?
I disagree with having matrix as a synonym for list. A matrix is only a particular type of list, and as such, is not interchangeable in its usage. For example, you would never call {1, {2, {3, {4}}}} a matrix.
A matrix is a special case of a list, that is, it's two-dimensional and rectangular. Matrices have a lot of special functions designed for them, and they're often treated as the mathematical object that they are than just "some arrangement of numbers". Therefore, I wouldn't say it's a good idea to define a matrix to be a list.
(On a side note, most objects are simply lists, e.g. Plot generates a Graphics object containing a long list of options and values.)
