Datapoint Bislama/Savvy
Save is both a lexical verb ‘to know’ and also an auxiliary verb marking ability or habitual.
The first attested use of save with the meaning 'know' is 1872; the first attested use of it as a verbal auxiliary (ability) is in 1859 [published in 1873].
Values 
A savvy word exists
- Example 23-24:
-
hem i no save se woman blong hem i bon finishem3sgiagrnonegsaveknowsecompwomanwomanblongposshem3sgiagrbonburnfiniscomplHe didn't know that his wife had (by that time) already been burnt.
Source: Meyerhoff nd
- Example 23-170:
-
all black man savey, no kidnapping nowallallblackblackmanmansavey,knownonegkidnappingkidnappingnownowMelanesians know that there's no kidnapping now.
Source: Moresby 1876: 96
- Example 23-169:
-
tanna man no save work [...] he too much lazytannaTannamanmannonegsavecanworkwork[...][...]he3sgtootoomuchmuchlazylazyTanna men can't work [...] they're too lazy.
Source: McFarlane 1873: 106
- Confidence:
- Very certain