W W

S18 = 2I J+fll (Kulczynski; eq. 7.25)

semimetric

No

No* (S13)

No* (St3)

S19 = ^WjSjWj (Gower; eq. 7.26)

metric

No

Yes

Likely

S20 = ^wjsf Swj (Legendre & Chodorowski; 7.27) metric

No

Yes

Likely* (S7)

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