Problems occur where a series of statements are sequential, because if one piece of the 'jigsaw' is missing it may be very difficult to piece together the rest. However, a repeat of the given information should clarify the situation.
Acceptability can also prove difficult. An individual may, for some unknown reason, not wish to consider a topic or idea at all or in part. The person then becomes unable to concentrate or simply thinks about something else.
Confidence is also important, because if a person feels they cannot sort out the information given they do not even try to attempt contemplating the issue.
Watching the above sequence repeatedly results in a better understanding.