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Synchronicity
No Cause Required
Remind learners that 'synchronicity' refers to related events without a cause, differing from direct cause-effect situations. 
Beware Overuse
Avoid overusing 'synchronicity' to describe any coincidence; it should be reserved for meaningful or striking ones. 
Subjective Interpretation
Understand that 'synchronicity' can be subjective; what seems synchronistic to one person may not to another. 