[nfbcs] truth tables

[Rasmussen, Lloyd]

You may create a shorthand method for representing the states, known only to you.  For example, a dot can represent a 1 and no dot a zero in a particular position of a braille cell.
But you really need a braillewriter to do this sort of layout quickly.
I don't remember anything about Carnot maps, but I did something like this 45 years ago.

Lloyd Rasmussen, Senior Staff Engineer
National Library Service for the Blind and Physically Handicapped
Library of Congress   202-707-0535
http://www.loc.gov/nls
The preceding opinions are my own, and do not necessarily reflect those of the Library of Congress, NLS.

-----Original Message-----
From: nfbcs [mailto:nfbcs-bounces at nfbnet.org] On Behalf Of Mike Jolls via nfbcs
Sent: Friday, September 26, 2014 9:26 AM
To: nfbcs at nfbnet.org
Subject: Re: [nfbcs] truth tables

Commenting on another responder, Excel is in fact a good way to layout truth tables.  However, here's a question.
What happens if you want to do some tabular work but you're not near a PC with Excel, or maybe your electronic solution has died?
OK, this might not happen very often, but in the event it does, and if you're not sighted where you can simply lay it out on paper like in the old days before we had software such as Lotus 1,2,3  (I'm dating myself there) or Microsoft Excel, what do you do if you're blind or your vision is such that you can't deal with pencil and paper?
Is the only choice Braille at that point?
 
I suppose if the answer is Braille, then you better have a 40 column slate and 11.5 inch wide paper.
And, hope that the data columns you need aren't so many that they won't fit in 40 columns.
 
I ran into this problem when I had severe cataracts and was considering doing it with a slate and stylus.
I have to say it was difficult remembering exactly how I was lining up columns and getting the placement right.
That's why I asked what you do if your electronic solution goes away.
Is there an acceptable Braille method to use when you don't have the electronic method available and you can't use Jaws / Magic / Excel or some similar solution?
 
> Date: Mon, 22 Sep 2014 19:52:43 -0400
> To: program-l at freelists.org; nfbcs at nfbnet.org
> Subject: [nfbcs] truth tables
> From: nfbcs at nfbnet.org
> 
> Hello all:
> Is there a good way of representing truth tables? For the basic 
> functions it's pretty simple to just write straight text, but it gets 
> harder as you add to it. I'd like to be able to represent them in a 
> way that would make it easier to understand logic operations.
> Thanks,
> 
> --
> Take care,
> Ty
> http://tds-solutions.net
> He that will not reason is a bigot; he that cannot reason is a fool; he that dares not reason is a slave.
> 
> 
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