/
Vagueness and bivalence Vagueness and bivalence

Vagueness and bivalence - PowerPoint Presentation

liane-varnes
liane-varnes . @liane-varnes
Follow
377 views
Uploaded On 2016-08-07

Vagueness and bivalence - PPT Presentation

Is Terry Schiavo alive or dead Parents claim that she is in a minimally conscious state therefore she is alive Husband claims that she is in a passivevegetative state therefore she is not alive ID: 436840

argument heap logic accept heap argument accept logic alive vague apply hold legitimately premises deny rice true paradox state bivalence

Share:

Link:

Embed:

Download Presentation from below link

Download Presentation The PPT/PDF document "Vagueness and bivalence" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.


Presentation Transcript

Slide1

Vagueness and bivalenceSlide2

Is Terry Schiavo alive or dead?

Parents claim that she is in a minimally conscious state, therefore she is alive.

Husband claims that she is in a passive-vegetative state, therefore she is not alive. Slide3

Vague spectrum

true

falseSlide4

Paradox of the heap

Take a heap of rice

Then take away grains of rice one piece at a time.

When will the heap cease to exist as a heapSlide5

The forms of the arguments

p

1

p

2

p

2

p

3

.......

p

n-1

p

n

∴ p

1

p

nSlide6

What are the alternatives

Deny that the problem is legitimately set up. That is, hold that logic does not apply to

vague expressions.

Accept that logic does legitimately apply here but hold that this particular argument is

invalid.

Accept both that logic applies in such cases and that the argument is valid, but deny one

of the premises.

Accept the argument and the premises, and hence embrace the conclusion also.Slide7

Other problems with bivalence

Paradox

"This sentence is not true."

Non-denoting terms

"The present king of France is bald."

Presupposition failure

"Since when have you stopped beating your wife?”

Future contingents"There will be a sea battle tomorrow."