In other words, always beware of anyone who tells you a topic is above you or better left to experts. This person may, for some reason, be trying to shut you out. You can understand almost anything. If you know you are giving it your best effort and you are still finding an explanation difficult to grasp, it may be because the expert has poor communication skills. It could also be that the expert doesn't want you to grasp it. Many people are twice as smart as they think they are, but they've been intimidated into believing some topics are above them.
I think every person sitting around the table at an IEP meeting ought to be required to read that statement!