| hypo | future interest |
| O to A for life, then to B, but if B smokes cigarettes, the property will revert to O. B has? | |
| O to A for life, O has? | |
| O to A for life, then to B's children. B has two children. B's children have? | |
| O to A for life, but if A gets arrested, then to B. B has? | |
| O to A for life, then to B. B has | |
| O to A for life, then to B if B marries C. B has | |
| O to A as long as A does not fail out of law school, O has? | |
| O to A, but if A consumes alcohol, O may re-enter. O has | |
| O to A for life, then to B's children. B currently has no children. B's future children have? | |
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