Yes “8 out of 6

[(former)FormerSanDiegan]

Yes “8 out of 6 times”.

Yield curve inversion is necessary, but not sufficient going into a recession. And that is for cases where the yield curve remains inverted over extended periods of time.

The verbage was intened to point out that these indicators are not perfect.

See the link
http://www.safehaven.com/article-4321.htm