Datapoint Singlish/Ability verb and epistemic possibility

Values

Ability verb cannot express epistemic possibility

Example 21-73:
You can hear the engine.
You
2sg
can
can
hear
hear
the
det
engine.
engine
You can hear the engine.

Source: Lim 2004: 45

Example 21-74:
You can perhaps/possibly hear the engine.
You
2sg
can
can
perhaps/possibly
perhaps/possibly
hear
hear
the
det
engine.
engine
You can perhaps/possibly hear the engine.
Confidence:
Very certain