A man in a red shirt is standing next to a woman in a blue dress. They are both holding hands and smiling at each other. Can't be, said Julius positively. Julius was convinced that it couldn't be. He was 50. If this premise is true, what does that tell us about whether it entails the hypothesis 'He was twenty five.'? The sum of the frequencies of two waves is equal to the frequency of the resulting wave.
yes
yes
no
no