"Brain tumor are known to cause seizures."
Is the above claim true?
Options:
- yes
- no
yes
There has been enough medical research to determine the relationship between brain tumors and seizures.

Yes / no, is the following a verifiable fact?
"Zoologists placed Water buffalo in the category of invertebrates until the twentieth century."
no
People were never confused about whether water buffalo had spines.

Is the following statement true?
"In her home country of Slovakia, Melania Trump is a princess."
no
Melania Trump is not of royal linage in Slovakia or any other country.

Is the following a factual statement?
"The number 7 is a number that is used in numerology."
Options:
- yes
- no
yes
The sentence that I wrote about the number 7 is true because it is a fact that can be proven.