🚀 go-pugleaf

On Oct 23, 11:50 am, r norman <r_s_norman@_comcast.net> wrote:
> On Tue, 23 Oct 2007 08:36:39 -0700, Scott H <zinites_p...@yahoo.com>
> wrote:
> >That's definitely how it looks from the outside.
>
> >I recently brought up the internal asymmetry of the human body on
> >sci.physics, when I asked if it ultimately depended on the laws of
> >magnetism, or on some other law of nature that distinguishes between
> >right and left, as by a cross product. The answer I received was "no,"
> >but without a convincing explanation.
>
> >I've heard that while the left hemisphere can process both affirmative
> >and negative judgments, the right hemisphere can only process
> >affirmative ones.
>
> >I've also read that while the left medial prefrontal cortex "processes
> >a personal network related to the self" (www.sciencedaily.com/releases/
> >2003/11/031111064658.htm), the right medial prefrontal cortex
> >facilitates our theory of others' minds. In other words, if these
> >articles are true, then the left medial prefrontal cortex processes
> >*subjective* information (about ourselves) and the right medial
> >prefrontal cortex processes *objective* information (about others'
> >mental states). This is a little ironic considering that many consider
> >the right hemisphere to be involved in the more subjective aspects of
> >our thinking. That's why I want a book based on fact and not
> >speculation.
>
> You do have an awful lot of speculation in your thinking.

[snip]

> You don't look for "left-hand rules" or "right-hand rules" in physics
> for the answers that are more reflected in simple developmental
> processes.

How do you know that these simple developmental processes aren't in
turn dependent on properties of the laws of physics? (See below.)

> During embryonic development, there are genes that
> determine body axes. Developmental process easily differentiate
> between anterior and posterior, between dorsal and ventral.  Why would
> you suspect that they can't also differential between left and right
> even though most animals have body structures that are largely
> bilaterally symmetric?

On the contrary, I admit that developmental processes differentiate
between right and left.

More clearly stated, if

1. A is the property of the laws of physics by which they distinguish
between left and right (as of, say, the law of magnetism),
2. B is the ability of the embryo to differentiate between left and
right, and
3. C is the chirality of the fully-grown human body,

then you are telling me that B contributes to C, and that "we don't
look for A as the answer to C." To this, I respond that A may still
contribute to B and thereby ultimately contribute to C.