If the concrete is poured while the ground is wet, it will not form a solid foundation  If the concrete does not form a solid foundation, it will either settle unevenly or crack
So if the concrete settles evenly, either it was poured while the ground was dry or it will crack
If the camera is working properly, the photograph will not be blurred. The photograph will be blurred if the film is either not properly exposed or not properly developed. So if the camera is working properly, the film will be both properly exposed and properly developed.