When In Doubt Work Until The End

There are times to finish a project and another to bail on one.
It’s much easier to bail.
Much harder to finish.
Human tendency will be to bail on anything hard. 
But perseverance and grit are built on overcoming this. 
So when in doubt finish the project.
There may be some time “wasted” but in those moments you’re learning the more important meta-skills of perseverance and grit.