Yes / no, is the following a verifiable fact?
"Ducks do not fly in the morning."
no
Ducks are known to fly at any time.

"Egyptian hieroglyphs come in cereal form that you can purchase."
Is the above claim true?
Options:
- yes
- no
no
Egyptian hieroglyphs are not licensed for any commercial purpose.

Is the following statement true?
"Clerkenwell took its name from the Clerks' Well in Farringdon Lane (clerken was the Middle English genitive plural of clerk, a variant of clerc, meaning literate person or clergyman)."
no
The Monastic Order of the Knights Hospitallers of St John of Jerusalem had its English headquarters at the Priory of Clerkenwell.

Is the following sentence factually correct?
"A Bull sharks swim in both salt water and fresh water."
Options:
- yes
- no
yes
Bull sharks have been spotted un oceans as well as rivers and lakes.