<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=US-ASCII" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 11.00.10570.1001"></HEAD>
<BODY id=role_body style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; COLOR: #000000"
bottomMargin=7 leftMargin=7 topMargin=7 rightMargin=7><FONT id=role_document
color=#000000 size=2 face=Arial><FONT lang=0 color=#0000ff size=2 face=Arial
FAMILY="SANSSERIF" PTSIZE="10">
<DIV>
<DIV> </DIV>
<DIV>
<DIV><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial>From: Micha Berger via Avodah
<A>avodah@lists.aishdas.org</A><BR><BR><BR><BR>Someone mentioned tahorapp.com
on-line, so I took a look at their web site.<BR>To quote:<BR>> Keeping
Tradition &<BR>> Keeping Your Privacy<BR><BR>> Rabbinically Approved!
Anonymously send pictures of your Taharas<BR>> Hamishpacha questions to a Rav
right from your own home. Receive answers<BR>> quickly and privately.
Download Tahor App For Free!<BR><BR>I then thought of "The Dress"
<https://en.wikipedia.org/wiki/The_dress>,<BR>a picture of a
black-and-blue dress that floated around the internet that<BR>many of us
perceived as white-and-gold......<BR><BR>.....So, given that people guess at the
background lighting when they see a<BR>picture and then subconsciously correct
for it (see explanation on<BR>wikipedia page), how could a rav rely on a Tahor
App image?<BR><BR><BR>-- <BR>Micha
Berger
<BR>micha@aishdas.org
<DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>>>>>>></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>According to wiki the human eye can distinguish about ten million different
colors. Other sources say "only" seven million. (Not relevant here
but interesting: Some birds, some fish, some reptiles, even some
insects, like bees, can see colors we can't see.)</DIV>
<DIV> </DIV>
<DIV><A
href="https://en.wikipedia.org/wiki/Color_vision">https://en.wikipedia.org/wiki/Color_vision</A></DIV>
<DIV> </DIV>
<DIV>A computer screen can display about 33,000 different colors -- only a
small fraction of the number of shades in nature that the human eye can
see.</DIV>
<DIV> </DIV>
<DIV><A
href="http://www.rit-mcsl.org/fairchild/WhyIsColor/Questions/4-6.html">http://www.rit-mcsl.org/fairchild/WhyIsColor/Questions/4-6.html</A></DIV>
<DIV> </DIV>
<DIV>The takeaway -- to my mind -- is that the tahor app probably can't be
relied on. The rav needs to see the actual color, not on a screen.</DIV>
<DIV> </DIV>
<DIV><FONT lang=0 color=#0000ff size=2 face=Arial FAMILY="SANSSERIF"
PTSIZE="10"><BR>--Toby Katz<BR>t613k@aol.com</FONT><FONT lang=0 color=#ffffff
size=2 face=Arial FAMILY="SANSSERIF" PTSIZE="10"><BR>..</FONT><FONT lang=0
color=#0000ff size=2 face=Arial FAMILY="SANSSERIF"
PTSIZE="10"><BR>=============<BR><BR><BR>-------------------------------------------------------------------</FONT></DIV></DIV>
<DIV> </DIV><FONT color=#0000ff></FONT>
</FONT></DIV></DIV></DIV>
<DIV><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial></FONT> </DIV>
<DIV><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial></FONT> </DIV>
<DIV><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial> </DIV>
<DIV><BR><BR><BR> </DIV></FONT></FONT></FONT></BODY></HTML>