Question 1
Determine with a Venn diagram whether "Since some grapefruits are citrus and all oranges are citrus, some oranges are grapefruits" is
◦ valid
◦ invalid
Question 2
Determine with a Venn diagram whether "Since some whistles are baby toys and no Barbie is a baby toy, no whistle is a Barbie" is
◦ valid
◦ invalid