Datapoint Principense/Ability verb and epistemic possibility

Epistemic possibility is expressed by a construction that implies the verb po 'can'; see Example 91.

Values

Ability verb cannot express epistemic possibility

Example 37-88:
Txi ka po fêzê kwisê.
Txi
2sg
ka
ipfv
po
can
fêzê
do
kwisê.
this
You can do this. OR: You are able to do this.

Source: Maurer 2009: 73

Example 37-89:
Zwan sêbê landa.
Zwan
Zwan
sêbê
know
landa.
swim
Zwan can swim (= he was taught how to swim).
Example 37-90:
Ee, txi po gita [...].
Ee,
yes
txi
2sg
Ø
ipfv
po
can
gita
shout
[...].
[...]
Well, you can shout [...]. OR: Yes, you may shout [...].

Source: Maurer 2009: 183

Example 37-91:
Ê ka po sa ya ê sa lala.
Ê
expl
ka
ipfv
po
can
sa
cop
ya
comp
ê
3sg
sa
cop
lala.
there
It is possible that he is there.

Source: Maurer 2009: 106

Confidence:
Very certain