If it is Saturday then i'm playing hockey . Its Saturday, so Im playing hockey

If its Sunday then i'm going to church and i'm in church so it must be Sunday

If it is Friday then i'm going swimming and i'm swimming so its Friday

All planets are made of chocolate, i'm made of chocolate so I am a planet.

All planets are called Pluto, Tim is a planet so he is called Pluto

All planets have rings, Saturn has a ring, so Saturn is a planet

All birds lay eggs, crocodiles lay eggs so crocodiles are a bird.

All reptiles are cold blooded; snakes are cold blooded so snakes are reptiles

All mammals are warm blooded, giraffes are mammals so giraffes are warm blooded.

All birds have wings, parrots have wings so parrots are birds

Birds can fly, penguins are birds so penguins can fly

All flies have wings, bluebottles are flies so bluebottles have wings

If i'm in bed then I am sleeping and i'm in bed so I must be sleeping

If i'm awake then it is day time, it is day time so I must be awake

If I am dreaming I must be asleep and i'm asleep so I must be dreaming

Cows cause greenhouse gases, vehicles cause greenhouse gases so cows are vehicles

If hens lay eggs then monkeys eat bananas, hens do lay eggs so monkeys must eat bananas

If dogs are poodles then dogs are mammals but dogs aren't poodles so dogs cant be mammals.

if x then y, not x so not y

If x then y, x then y

If x then y, y therefore x

All snails have shells, Jim has a shell so jim is a snail

All crabs have claws and lobsters have claws so lobsters are crabs

All prawns have a shell and Stephanie is a prawn so she has a shell

All dragons breathe fire and Excalabor breathes fire so Excalabor is a dragon.

All wizzards attend hogwarts and Harry attended Hogwarts so harry is a wizzard.

All Slytherin pupils turn out evil, Voldermort was in Slytherin so Voldermort is evil.