#20920: Changes to Unknown class
-------------------------------------+-------------------------------------
       Reporter:  eviatarbach        |        Owner:
           Type:  enhancement        |       Status:  new
       Priority:  major              |    Milestone:  sage-7.3
      Component:  misc               |   Resolution:
       Keywords:  days78             |    Merged in:
        Authors:                     |    Reviewers:
Report Upstream:  N/A                |  Work issues:
         Branch:                     |       Commit:
  u/eviatarbach/unknown              |  7d95643efc6699998240ba08c95006ae4fd9c482
   Dependencies:  #20919             |     Stopgaps:
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Comment (by vdelecroix):

 What is the point of an `Undecidable` class? To my mind this is completely
 useless.

 - either you have an algorithm that works sometimes (because the problem
 is undecidable). If an instance of this algorithm fails, then you should
 raise an error or possibly returns `Unknown`.
 - or you have no algorithm for a given problem and it makes no sense to
 write an empty Python function for that.

--
Ticket URL: <https://trac.sagemath.org/ticket/20920#comment:4>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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