LAST SUMMER, while on a getaway in Palm Springs, my wife and I saw "Inception," the mysterious movie starring Leonardo DiCaprio. If you haven't seen it, here's my best synopsis: Leo and his thievish crew enter others'subconscious through a practice called "dream invasion," which involves penetrating a target's sleepy state and then extracting or planting information for the perpetrator's own benefit. Better yet, the most skilled invaders are able to explore several dreams deep-a dream within a dream within another dream.
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