In the previous article, we discussed explicit cooperation with evil. Explicit cooperation is always also either formal cooperation, or material cooperation. These three types of cooperation (explicit, formal, material) depend upon the three fonts of morality (intention, moral object, circumstances). Explicit cooperation is based on the first font of intention. Formal cooperation is based on the second font of moral object. Material cooperation is based on the third font of circumstances.
If you sin by intention only, then your act, while a sin, is not the sin of cooperation with evil, since you have not cooperated by the choice of an intrinsically evil act (formal cooperation), nor by the circumstances of your act (material cooperation). In order for your sin by intention to be also explicit cooperation, it must also be either formal or material cooperation.
On the other hand, if you do not intend to cooperate with the sin of the other person, so that your intention in the first font is good, your chosen act and/or its circumstances could still be formal or material cooperation (or both). In such a case, the formal or material cooperation is called implicit, rather than explicit. In implicit formal cooperation or implicit material cooperation, the cooperator does not intend to cooperate with the sin of the other person, and yet his chosen act and/or its reasonably anticipated consequences do in fact cooperate with the sinful act of the other person. A good intention alone is not sufficient to make your acts moral. If you intend good, but you do evil, then you have still sinned. And this remains true when your act is sinful by formal or material cooperation with the sin of another person.