False Beats / Loose pins

[Jason Kanter]

The logic is not necessarily "if A then B." There may be a third (at least)
element that is required. "If A [and C] then B." What Ric is demonstrating
is that loose pins *by themselves* do not cause false beats; but loose pins
and [some other condition] still may do so. Maybe that other condition has
to do with the string -- how it was originally stretched across the
termination points -- , or the other termination point, or the angle of the
upper surface of the bridge, or even something to do with wave travel
through the bridge and soundboard. Probably it's not easily testable. 
But we can't conclude "if not B then not A" until we know certainly that
there are no other elements involved. Ric's instance proves that "if not be
then not A" is false.

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Porritt, David
Sent: Wednesday, April 05, 2006 10:17 AM
To: Pianotech List
Subject: RE: False Beats / Loose pins

Richard:

So I was told that eating ice cream will make me fat.  Does this mean that
if I avoid all ice cream that I'll stay slim?

dp

David M. Porritt
dporritt at smu.edu

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ric Brekne
Sent: Wednesday, April 05, 2006 9:44 AM
To: pianotech at ptg.org
Subject: False Beats / Loose pins

David.

Either they cause false beats...or they dont.  You cant have it both ways.
The rules of logic state:

 If the statement <<If A then B>> is true, then every time A occurs B
follows. If B does not follow, then the statement <<If A then B>> simply

doesnt hold and there must be another reason for B.

Cheers
RicB

---------------------
While false beats can be caused by loose pins it doesn't necessarily follow
that all loose pins will cause false beats.  

David Love
davidlovepianos at comcast.net