Words link like leaves on trees.
Word webs help us to explain what we see and to discover what is hidden beneath the surface. 
Flood waters at Pittsburgh, Pennsylvania.
How is learning both spoken and imagined simultaneously?
Social groups are not just a human experience, social animals relate to each other in a sensory and a cognitive way such that an internal visualization abides of our external encounter so that we recognize something familiar as different from another new thing.
Defining terms
bifocal -- to see in two ways, stereoscopic viewing in order to see depth of field.
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