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According to the definition, when <math>c</math> is a very low probability event,<math>nec(e,c) \approx nec'(e)</math>. When <math>C</math> is a continuous state space, the two can be considered equivalent.

According to the definition, when <math>c</math> is a very low probability event, <math>nec(e,c) \approx nec'(e)</math>. When <math>C</math> is a continuous state space, the two can be considered equivalent.

Note: The definition of <math>nec'(e)</math> is different from the definition of <math>nec^\dagger(e) = P(e|C)</math> in the literature<ref name=":0" />. The relationship between the two is <math>net'(e) = 1 - nec^\dagger(e)</math>.

Note: The definition of <math>nec'(e)</math> is different from the definition of <math>nec^\dagger(e) = P(e|C)</math> in the literature<ref name=":0" />. The relationship between the two is <math>net'(e) = 1 - nec^\dagger(e)</math>.

===Causal Primitives, Determinism, and Degeneracy===

===Causal Primitives, Determinism, and Degeneracy===

As previously mentioned, EI (Effective Information) can be decomposed into two terms: determinism and degeneracy, which correspond to the causal primitives of sufficiency and necessity, respectively.  

As previously mentioned, EI (Effective Information) can be decomposed into two terms: determinism and degeneracy, which correspond to the causal primitives of sufficiency and necessity, respectively.