Everything is linked. The thing is to find the link. In fact, everything is linked in more ways than we can see (or imagine). The foot is linked to the head and we can see it but an ant may doubt it, debate it, philosophise over it, agonise and struggle over it because she/ he cannot 'see' it.
Thus, it is possible to assert that things may be connected even when we do not see the connection. Or, we may know the connection and therefore assume it exists. For example, when we see a foot moving we will assume that it is connected to a head (because this is generally the case), even though we do not see the head. That it may actually not be connected to a head is another matter.
Going a step further, if things may be connected even when we do not see their connection, it is also possible that things we see as being connected, like the head to the foot, may be connected to each other in ways that we do not (or cannot) see, apart from the connection that we can see. In other words, the foot and the head may be connected in more than just the "normal" way via the neck, torso and the legs. What if there is a direct connection between the head and the foot? A short cut. To suggest such a thing is to invite a pooh pooh from the reader since it is clear to the meanest intelligence that there is nothing shorter that a straight line between two points and, the connection between the head and the foot (via the neck, torso and legs) is almost a straight line.
But what would be true in three dimensional space may not be true in four dimensional or multi dimensional space. There may be a more direct, shorter connection between the head and the foot, than via neck, torso, limb. What if the connection was a wireless blue-tooth, or whatever?