8 Schrödinger puzzles

These quantum crosswords have, by design, more than one correct answer

Is it a wave or a particle? Sometimes, the answer is, yes. Or both.

Solutions to crossword puzzles are always unique, except when they're not. Here are the grids with mulitple correct answers from oldest to newest.

Click any thumbnail to see the full view, including animations!

Joon Pahk suggested the name for these puzzles, based on Erwin Schrödinger's poor cat who was either alive or dead. Or, more accurately, both alive and dead. Either answer is true. This sort of thing can happen when the strange world of the quantum impinges on our prosaic macro existence. And, as seen here, it also happens in crosswords.

Tue 11/5/1996
ICALLLOSTASTEP
MEDEAATLIBERTY
PROGNOSTICATION
AILALSOPSTONE
ISPYDOMBEE
REHABSAFERAZZ
RIBNORMPOE
CLINTONELECTED
AURSARAERR
TIASSASHVALOR
AITPASBARA
AWARDEERIEMAP
MISTERPRESIDENT
OSTRACISMRINGO
SHOELACESENTER
Jeremiah Farrell created the most famous crossword in NYT history. Published the day of the 1996 U.S. presidential election, the central prediction, "Lead story in tomorow's newspaper (!)", can read either BOB DOLE ELECTED or CLINTON ELECTED. The crossing answers fit the clues for either. Click the thumbnail for details. [Across Lite]
Wed 7/9/2003
VATBALMSJERKY
ISRATEUPUNTIE
CHAINMAILINEPT
TOURDEFRANCE
IRMASSOYIDS
MEANOUGHTACRE
NANAINABIT
FIVETIMECHAMP
GOTHAMEVEL
TGIFEASEDGITS
ESCPATMENSA
YELLOWJERSEY
QUEENAEROSMITH
BROWNSNAGSSSE
SISSYTOPSYTEY
Patrick Merrell followed up with this "prediction" about the Tour de France. [Across Lite]
Thu 7/27/2006
ITSAFACTBAHAMA
LEAPINTOELOPER
EMPERORPENGUINS
APSELEASETO
PITBOSSECON
COBTWICECHESS
SHOWIESTPRO
IMPOSELALALA
USDSPANDREL
MARLOBLACKMEG
IREDCOYNESS
SIMILAROREO
DAILYNEWSPAPERS
INTIMEPEEPHOLE
DESEEDACROSSES
Ethan Friedman was the next constructor to pull this stunt with this study in black and white. [Across Lite]
Thu 3/3/2011
ILKCAROMNAGAT
GOITALONEADELA
USSENATORVERBS
ASSETGAYOAT
NEEOYSTERNNE
ASSNUNOMCMIII
APLOMBAIMAT
ANDREWJACKSON
ABBIESOLOED
COARSEALOOTRA
RUTREDSKYHAT
ENEBOXIDENT
ADAIRTENNESSEE
GIMMEROYALTIES
ENSORANTEDSST
David J. Kahn gave us a history lesson with this Schrödinger puzzle. [Across Lite]
★POW Thu 9/5/2013
MAOISMPORTEDD
ONSTARDREINOR
INCITEFENGDYE
LEANEDAHNOLD
RAESCATTERED
CINNIGHTOWL
OSOSATITALOUD
RADIANIDIDSO
POSERFAWNEDER
STRATEGOORR
SPUTTEREDPAR
CANAANDICERS
ANDTTOPUNEVIE
LSUUTESSELENA
EYEMORTTRANKS
Damon J. Gulczynski parsed XorY type words, using them as hints to the squares with duality. [Across Lite]
Thu 1/30/2014
PISMOBURYERGO
AMPEDAREAPEEK
WHATSBLACKWHITE
NOMEELLAEENSY
OSAYLOAM
ANDREDALLOVER
LEETYROHERETO
AMAJDUDACID
NOLOSSSOARADO
THISNEWSPAPER
ADIAAKIN
VERNERAGEKIEV
ASUNBURNEDPANDA
MANENOIRARDEN
PUTSOWLSWAYNE
Dan Schoenholz incorporates a classic joke in this one. [Across Lite]
★POW Tue 4/1/2014
ARGOSKATRIFLE
MOUSEPADSORION
BESTTHREEMISDO
ISHHEMPBASHES
ERATENE
HUMBLERAISIN
IVIESMTIDACOB
NEXTHEADSLIRA
TAUNOLTEMONTY
SPRINTCOUGHS
ATEHOOT
SCENTSAUDISEC
TOSCAOUTOFFIVE
UNPINUNINSURED
BENDYRTESNINE
Andrew Reynolds plays on HEADS or TAILS, with an incredible 13 entries having two solutions. [Across Lite]

Pre-Shortz puzzles

As the Pre-Shortzian Puzzle Project keeps reminding us, many of the gimmicks that seem so modern have a longer history. There was at least one Schrödinger puzzle in the Maleska era:
Sun 2/7/1988SPACE SAVER
KABABSPCAWRATHHAG
OCALAERATHALOESENA
CLEANEDOUTADAGIORAT
HERESYFLAILORLANDO
ERICRESSICIER
PEEPEDATTHESPICEDHAMS
ALLAYPERISOLAFII
ALICETRONATILTNAST
RESELLIGORCESGILA
REBILLPATONNOW
ROASTSSAUCESANDBASTES
OSSANSERBESIDE
OLIDSGCEARLNANKIN
TONITAELSOEUFNOOSE
SHEILAPIANOCROAT
YOUCANNOTENSUREHEALTH
ANNUSTENETUSA
BLESSESDUELSITHACA
BISLANDAURETALIATOR
ENCETERNEEVERCREAM
REOSEUSSRODESTELA