Our investigation starts at a spot in Marchienne-au-Pont. A massive stone lies in front of a metal gate. We wonder about the things around us and how they continue to appear and disappear. Are we involved? We took a picture of the place and set up a lab in a local diy store. Here, we test ways to impact the presence of the stone. Results are neither certain nor lasting.
Causality is the relation between an event (the cause) and a second event (the effect), where the second event is understood as a consequence of the first.
Though the causes and effects are typically related to changes or events, candidates include objects, processes, properties, variables, facts, and states of affairs; characterizing the causal relation can be the subject of much debate. [1]
Magic combines multiple principles of attention, expectation, awareness, trust and perception. Magic techniques can provide methods and insights in how the brain constructs a model of the outside world from moment to moment, or what we think of as objective reality. [2]
There are many ways of making a stone (dis)appear.
[1] http://en.wikipedia.org/wiki/Causality
[2] Science and society: Attention and awareness in stage magic: turning tricks into research, Nature Reviews Neuroscience 9, 871-879 (November 2008)