[Avodah] Tahor App

[via Avodah]

From: Micha Berger via Avodah  avodah at lists.aishdas.org



Someone mentioned tahorapp.com  on-line, so I took a look at their web site.
To quote:
> Keeping  Tradition &
> Keeping Your Privacy

> Rabbinically Approved!  Anonymously send pictures of your Taharas
> Hamishpacha questions to a Rav  right from your own home. Receive answers
> quickly and privately.  Download Tahor App For Free!

I then thought of "The Dress"  <https://en.wikipedia.org/wiki/The_dress>,
a picture of a  black-and-blue dress that floated around the internet that
many of us  perceived as white-and-gold......

.....So, given that people guess at the  background lighting when they see a
picture and then subconsciously correct  for it (see explanation on
wikipedia page), how could a rav rely on a Tahor  App image?


-- 
Micha  Berger              
micha at aishdas.org      
 



>>>>>>
 
 
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.)
 
https://en.wikipedia.org/wiki/Color_vision
 
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.
 
http://www.rit-mcsl.org/fairchild/WhyIsColor/Questions/4-6.html
 
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.
 

--Toby Katz
t613k at aol.com
..
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