Uncertainty is uncertain!

Hamid R. Tizhoosh (hamid@pmt11.et.uni-magdeburg.de)
Mon, 6 Apr 1998 03:02:45 +0200 (MET DST)

Dear colleagues

There are different opinions about "uncertainty" in the fuzzy community
(its definition, sources and the best way to manage it). Some colleagues
do mean that uncertainty is a general problem with different sources
such as randomness, vagueness (or fuzziness) and ambiguity:


Uncertainty
|
-------------------------------
| | |
randomness vagueness ambiguity

Other colleagues do mean that uncertainty is mainly related with
probabilities(also uncertainty=randomness). In this point of view, the
main problem is "imperfect knowledge" with sources such as uncertainty,
vagueness and ambiguity:


imperfect knowledege
|
--------------------------------
| | |
uncertainty vagueness ambiguity

I am not going to comment these different views.
I am also not going to provoke new discussions on probability theory. We
have discussed enough on this topic. But, I mean it is on time to
develop a unique view within the fuzzy community. It is necessary
because the general confusion should be eliminated at last.

Hamid R. Tizhoosh
University of Magdeburg, Germany
http://pmt05.et.uni-magdeburg.de/~hamid/