@Anthrobus,
Anthrobus wrote:That the beast has the quality of being 'extant outside of my mind' is another parameter added in calling the beast a unicorn, a parameter which negates a former parameter 'imaginary', hence the subtlety of the adaptive aspect of definition is easy to miss when it is there...reconsider: is this true, and does the rest therefore follow?..
It is a name reassignment that occurs rather than a shift in definition, thus the name unicorn is reassigned to a new set of parameters which retains the common aspects of the two parameter sets choosing between the two parameters which are in conflict. 'imaginary' and 'extant outside of my mind' are not p and -p explicitly, there is some synthetic a priori interchange here. I think that this interchange though, is analogous to a bachelor being an unmarried man being the negation of a married man. One is true synthetic apriori;a bachelor is not a married man, and the other is analytic a priori. This can be tested though.
What do we mean when we say that something is not imaginary? In order that we consider this, we must consider the definition of imaginary which is
intended here. We might say that what is meant is that the sense of the unicorn is manifest not directly from external stimuli, but an amalgamate of memory of separate sense experiences. This condition is clearly necessary, but is it sufficient? It is clear that something which satisfies that condition is necessarily extant 'within one's mind' taking the state of being within the mind to be what is commonly conceived(a poor definition, I know, but I hope that it suffices). It is also clear that if the sense of the unicorn has not come from any single external stimuli that we could say that the amalgamate conception is not necessarily extant 'outside of one's mind' though the possibility that it could be is not denied by the definition. This is necessary for the definition not to restrict beyond its scope.
I would say that the condition is sufficient, perhaps you disagree and have a better condition, but I will say that henceforth that; in order that a unicorn be imaginary it is sufficient and necessary that the sense of the unicorn is manifest not directly from external stimuli, but an amalgamate of memory of separate sense experiences. Thus the negation should be that the unicorn be manifest from some singular experience of an external stimuli, ie, your conception of a unicorn must be derived from; seeing, smelling, touching, hearing,tasting, a single being that fits the parameters of the definition of a unicorn. I would say that this negation fits the parameter of 'extant outside of my mind', thus I would conclude that the statement is indeed true. An object cannot both have the property of being extant outside of the mind and imaginary. The imaginary object still exists, but it is a seperate entity.
This is flawed though. The unicorn 'becomes' extant outside of my mind and if my conception was totally in line with what I experienced of the unicorn, so the imaginary unicorn is necessarily replaced by the one which is not imaginary. What do you think AnthroBus?