# Re: Tegmark's New Book

On 14 January 2014 23:01, Bruno Marchal <marc...@ulb.ac.be> wrote:

>
> Physicists have not yet formal theory. Like all scientists they work
> informally.
>

You don't consider Newton's "Law of Gravitation" to be a formal theory? How
much more formal can you get than defining space and time and mass and
force then relating them all with

[image: F = G \frac{m_1 m_2}{r^2}\]
?

I'm guessing you mean something different by a "formal theory" to what I
would understand by that phrase.

When I ask Edgar for a formal theory I'd be delighted to get something like
Newton's law of gravitation rather than a load of hand waving verbiage.

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