simple = easily done or understood; not complex or complicated
- There are three simple steps to follow.
- The answer is really quite simple.
- simple life, simple design, simple solution, etc.
simplistic = treating complex issues and problems as if they were much simpler than they really are;
not complete or thorough enough
- A simplistic analysis of the issue.
- They have a simplistic point of view about the war.
- A simplistic approach to a complicated problem.