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Murder By Logic

Puzzle 7: Unhappy Thanksgiving

Difficulty:
Fun:
(based on 48 votes)

Thanksgiving: a day for family, feasting, and fatality. After her annual vegetarian Thanksgiving feast, Thea Turkee was murdered in her own kitchen, stabbed in the back with a carving knife, while her guests were napping in the living room. The following facts have been determined; can you find the killer?

Anyone who had both green beans and cranberry sauce may have had stuffing or pumpkin-flavored schnopps, but not both.
Anyone who had both corn on the cob and pumpkin-flavored schnopps may have had apple pie or pecan pie, but not both.
Everyone who had both stuffing and apple pie also had pecan pie.
Everyone who had cranberry sauce also had green beans, corn on the cob, or both.
Everyone who had both green beans and stuffing also had apple pie, cranberry sauce, or both.
Everyone who had both pecan pie and sweet potatoes also had cranberry sauce.
Everyone who had both cranberry sauce and pumpkin-flavored schnopps also had stuffing.
Everyone who had both pumpkin-flavored schnopps and mashed potatoes also had apple pie.

At the time of the murder, all four of Thea's guests claim to have been passed out in front of the television, sleeping off the pumpkin-flavored schnopps. But the doors were locked, and there are no signs of forced entry. One of the guests must have been sober, and must be the murderer. Who had no schnopps and carved Thea Turkee?

Adelaide, who had green beans and sweet potatoes
Bill, who had cranberry sauce and apple pie
Connie, who had stuffing and corn on the cob
Donald, who had mashed potatoes and pecan pie

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