I have a colunmn called To Read Lookup name toread Yes/No
when I do a search.
#toread:yes shows all books marked yes
#toread:checked shows all books marked yes
#toread:true shows all books marked yes

#toread:no shows all books marked no and undefined
#toread:unchecked shows all books marked no and undefined
#toread:false shows all books marked no and undefined

This happens with all my custom columns that are Yes/No

How do I get it to show me just the ones marked no