Provide a mechanism to show how H2C 
C(CH3)2 is polymerized using BF3 as the initiator.
Definitions:
Conditioned Stimulus (CS)
A previously neutral stimulus that eventually elicits a conditioned response after being paired with the unconditioned stimulus.
Unconditioned Stimulus (US)
A stimulus that produces a response without prior learning.
Contiguity
In learning theory, refers to the proximity in time or space between two events, which can influence the association formed between them.
Contingency
A future event or circumstance that is possible but cannot be predicted with certainty, often requiring planning for multiple outcomes.
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