General canonical models for graded normal logics (graded modalities IV)
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We prove the canonical models introduced in [D] do not exist for some graded normal logics with symmetric models, namelyKB°, KBD°, KBT°, so that we define a new kind of canonical models, the general ones, and show they exist and work well in every case.
KeywordsMathematical Logic Computational Linguistic Symmetric Model Canonical Model Normal Logic
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