'Materially Participate'

Am I going crazy? The responses in the top thread about 'What does 'materially participate' mean?' are pretending like they provide a clear answer.

Look at this winner of a line in there:

"Your participation was substantially all the participation in the activity of all individuals for the tax year, including the participation of individuals who didn’t own any interest in the activity."

That sentence is nonsense. Even my 4th grade English teacher would tell me to rewrite that.

 

Our country needs to make taxes easier. Can't believe I've paid TurboTax $69 and I'm stuck posting here because they still didn't help me get through this.