“It needs to be an unpredictable change. When it’s freezing or raining for a couple of days you can anticipate that sidewalks could be slippery. But when you go for a walk the first day after a night when the temperature dropped down to ten degrees below zero, you might not anticipate a change in passability. Nevertheless it would still need to be considered in court whether such change of passability was predictable by reasonably prudent person or not. For example, you could have looked out of the window or checked the thermometer. When it comes to the fourth, fifth, sixth day, it’s most probably not a change of passability that couldn´t be anticipated.” In other words, it is no longer considered a sidewalk defect.