Question:
Based on the premise "Her husband says she actually spends less time on either because we're there.", can we conclude that "Our presence always prevents people from doing tasks."?
****
Answer:
it is not possible to tell

Question:
Based on the premise "The McCain campaign has more specific evidence of success.", can we conclude that "The McCain campaign shows evidence of success. "?
****
Answer:
yes

Question:
Based on the premise "Another time I had to go and look after my brother Kenny in Buffalo.", can we conclude that "Kenny was sick of malaria and typhoid."?
****
Answer:
it is not possible to tell