An explanation of how an intervention may work does not mean that it does work or tell us how well it works.
Interventions that should work in theory can often not work in practice, or may turn out to have negative effects. An explanation of how or why an intervention might work does not prove that it does.
For example, some people believe that teaching students according to their learning styles (e.g. visual, auditory, kinaesthetic) would have a positive impact on their learning. However, fair comparisons have shown that this is not the case.
Do not assume that claims about the effects of interventions based on an explanation of how they might work are correct if the interventions have not been assessed in systematic reviews of fair comparisons.
BEWARE of explanations of intervention effects that are not based on fair comparisons.
REMEMBER that explanations of intervention effects can be wrong.