If I understand correctly it just means whether the accused KNEW the possible risks or was ignorant of them and SHOULD have known. In this case the question is whether Oscar knew that shooting at someone as he did, might kill them. Seems a simple and clear yes to me, no complications yet Masipa judged there is reasonable possibility he did not know.
"A person acts with intention, in the form of dolus eventualis, if the commission of the unlawful act or the causing of the unlawful act is not his main aim, the unlawful act may be committed or the unlawful act may ensue, and he reconciles himself to this possibility...
It is sufficient if the accused, having foreseen real possibility of the existence of the circumstances in question, nevertheless persisted in his conduct irrespective of whether it existed or not." http://www.justice.gov.za/sca/judgments/sca_2013/sca2013-034.pdf
I think a gun expert like Pistorius, after passed his proficiency test, would have 'foreseen' the death of whoever was in the difficult to manoeuvre toilet-space. From this reading of 'intention', it seems important that an ammunition choice like black talons is highly relevant, even for a 'subjective' test about being "reconciled to the possibility" of death.
I'm concerned why Masipa disregarded State evidence and ignored ammunition choice under intention.