Definitions

Observation, 

Opinion, 

Judgement, 

Reflection, 

Insight: 

I suppose one act can also be the other, but not always. For instance, an observation might be an insight, but not all observations are insights. Like wise for judgments. I was curious about the definitions for these terms, so here they are. 

Observation is either an activity of a living being (such as a human), which senses and assimilates the knowledge of a phenomenon, or the recording of data using scientific instruments. 

Observations are statements which are determined by using the senses. 2 a: an act of recognizing and noting a fact or occurrence often involving measurement with instruments observations> b: a record or description so obtained 3: a judgment on or inference from what one has observed ; broadly : remark , statement

Opinion: a view, judgment, or appraisal formed in the mind about a particular matter

Judgement: 1 a: a formal utterance of an authoritative opinion b: an opinion so pronounced

Reflection:6: a thought, idea, or opinion formed or a remark made as a result of meditation7: consideration of some subject matter, idea, or purpose
Insight 1 : the power or act of seeing into a situation : penetration2 : the act or result of apprehending the inner nature of things or of seeing intuitively