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Balancing Equations


When doing experiments, we have two choices.  We can make "logical" assumptions about the behavior of variables or we can avoid such assumptions altogether by simply measuring (estimating) them.  The simulator of this exercise helps us to understand why making certain assumptions about variables can be entirely illogical.  

In a data-driven biology, experiments are designed as equations thereby eliminating most assumptions.  Moreover, those that remain can often be checked.

A simple example often tells the best story.  To compare concentrations, for instance, we must assume that the unit of reference volume (cm) or weight (g, mg) is the same for the control and experimental samples.  Is this a logical assumption?  No.  Want to know why?  Take the exercise.