A formal scientific study usually is required to distinguish between coincidences and true reactions.

The following picture also shows the difference between conrotatory and disrotatory reactions:

Some striking parallels between computer simulations and real chemical reactions have recently emerged.

However, studies have been done that show that the correlation between emotions and physical reactions are moderately weak.

There was a pretty even split between negative and positive reactions.

Carpentier tries to establish the idea that a distinction must be made between revolutions and reactions.

But these "simple mappings between stimuli and reactions will not be enough to keep the organisms from encountering problems."

It is well documented that there are strong interactions between the turbulent flow and reactions.

Also, there can be a difference between male and female reactions to the death of a pet.

So you need to make a distinction between phase-changes and chemical reactions.