QUESTION: Is myocardial infarction a brain problem?
Please give rationale first, then the answer.
ANSWER: Myocardial infarction is a problem in the heart. The equivalent in the brain would be similar to a stroke.. The answer is: no.

QUESTION: Do you need different colored pens for sudoku?
Please give rationale first, then the answer.
ANSWER: Sudoku is played both online and offline. Sudoku has no color component in the game.. The answer is: no.

QUESTION: Did the Qwerty keyboard layout predate computers?
Please give rationale first, then the answer.
ANSWER: The Qwerty layout was originally developed for mechanical typewriters in the 1870s. ENIAC was considered to be the first computer, built in the late 1940s.. The answer is: yes.

QUESTION: Is week old chlorine water safe to drink?
Please give rationale first, then the answer.
ANSWER:
Chlorine is a chemical that is the second lightest halogen element. Chlorine is toxic and can attack the respiratory system of humans. Chlorine is highly soluble in water and will dissolve in around 4 and a half days. The Water Quality and Health Council states that chlorination of drinking water protects consumers from diseases caused by waterborne microorganisms.. The answer is: yes.