Final answer:
The probability of 0.86 suggests that the event in question is highly likely to occur, but it is not guaranteed.
Step-by-step explanation:
The probability 0.86 indicates that the event is likely to occur. In probability, an event is considered likely to occur if it has a probability close to 1 but not equal to it. A probability of 1 signals certainty that the event will occur, while a probability of 0 means the event is impossible to occur. Therefore, a probability of 0.86 signifies a high likelihood of the event happening, but it is not a guarantee.