Who knows a half?
?חצי - מי יודע
In the spirit of the song "Echad - mi yodeya", please post interesting and significant Jewish facts about the number 0.5.
Lazy gematria may be worthy of discission, but perhaps not of a full-fledged answer.
Check out mi-yodeya-series for the previous three hundred forty eight entries in this ongoing series.
Please include sources for your information wherever possible, as with all other answers on this site.
I do not know why this number was omitted.