When trying to decide if an argument is sound, which type of question should you ask?

What happens once in a minute twice in a moment and never in a thousand years?

What does the word subordinate mean in this sentence? the office manager spoke to her subordinate in a cordial tone.

Which line of dialogue best describes mrs. x’s sense of superiority over miss y at the begging of the play? a. “if you wanted to shoot me it wouldn’t be so surprising, because i stood in your way.” b. “home is the best of all, the theatre next and children—well, you wouldn’t undertake that.” c. i embroidered them myself—i can’t bear tulips, but he wants tulips on everything.” d. it’s sinful to sit here and make fun of ones husband this way when he is kind and a good little man.”