How is a theory formed?

Are there real mermaids and if so how many sightings have been made? What happens to the pulse pressure between the aorta and the capillaries? Who recorded the 2008 UFO sightings in Turkey? How does a witch travel? What countries relies almost exclusively 96 percent of its freshwater coming from outside its borders? Why do you keep dreaming of being attacked by someone? What does it mean to dream of a large black eagle? In the excerpt from morte d'arthur how do the supernatural events surrounding king Arthur's death link the story to englands future? What does the idiom 'Pull the wool over someone's eyes' mean? Which sun signs is romantically compatible with Aries? Is a bird carcass in your birdbath a voodoo ritual? What is the personification and human trait or quality in the following sentence The wind whispered through the dark and gloomy forest? What star sign is 1 November? What happens when you break a pinky promise? Is it true if you wake up between 2 and 3 am it means you're being watched by someone? What is the lucky numbers for Aquarius? What does it mean having three eyes? Do Scorpio men love to be chased? What sign of the zodiac are you were born on September 29th? Can you read Dork Diaries?