Ben Casanocha describes Seth Godin on blogging:

Seth says that blogging is not about the size of your audience but the "meta cognition" of thinking about what you're going to say and then saying it, having to explain yourself. Tom says that blogging is the most important professional thing he's done in the last 15 years. Note: Seth says "blogging is free." Not true. Blogging takes time. Time is money.

Ah meta-cognition. No wonder I've had difficulty blogging. I've been suspicious of all things meta for a while now, ever since deciding that fundamental understanding was not as relevant as it felt, and reading GEB and realizing how unstable introspection was liable to be, and then coming across Yudowsky's treatises-for-the-purpose-of-epistemic-health (here) and realizing how many of the mistakes I made myself.

With meta-levels as depth, my searches have been too deep and not wide enough. As I have opened my eyes to the evidence, I have realized how little the type of depth I favored corresponded to a real reduction in decisional uncertainty. Deep thinking can still be good, but not deep thinking of this sort. Bad assumptions and bad recursive structure, in other words. Depth is not virtue in of itself, it can only be if the assumptions and algorithms followed are sound - to understand is to compress, and to compress one is refining the mapping and better using the primitives in the representation for a given reality. To do that, one has to understand both reality and the primitives. Doing so separates specification from implementation - not every thought a brain thinks is about itself.

Lumbar support straps are not common as it is, and I'd have to try one out to find out why, but I would really like to see one combined with a simple massage device, perhaps for use on public transportation.

When SMSing multiple people, I wish there were a "Reply to All" function. This would be relatively easy to implement in the same manner as conference calling services, by having each participant SMS the same number and extension, and thereafter receiving all messages from said cluster. Having a web-accessible trail for such a service would be a bonus.

Gerald Sussman teaches a class at MIT called The Structure and Interpretation of Classical Mechanics, where students study classical mechanics with the aid of powerful Scheme notation.

Using Scheme has the benefit of exposing just how impressionistic popular calculus notation is. For example, that partial derivatives operate on function positions is something that emerges straight from the notation - making it much easier to understand the distinct between taking a derivative and evaluating it at a point or on a plane, and clarifying the distinction between a variable and a number.

The crucial ingredient is the compiler which processes the custom notation, an evaluator which is uniform across space and time. Even though the compiler is effectively a black box, the extent to which we are certain of its spatial and temporal invariance and its simplicity (i.e. it is incapable of willfully conspiring against you, or of distinguishing between non-special variable names), it provides for an effective learning environment.

In a way, this is a specific demonstration of a more general principle, that it is only possible to learn about the world to the extent that it repeats. The usual assumptions are those of uniformity over space and time. Such assumptions can turn out to be wrong, of course - the Lucas Critique warns against the use of historical data without properly conditioning the correlations against hidden contexts / structural variables.