Events can be spontaneous or non spontaneous. Spontaneous is defined as occurring without apparent external cause. Non spontaneous events are causal, that is, there is cause and effect.
Suppose an event occurs, for example alpha decay, then is it possible to conclude that the event was partially spontaneous and partially causal at the same time? If yes, what are some examples of partially spontaneous and partially causal events? What will be the nature of such an event if it occurs?
Can I call such an event as coincidentally spontaneous?