What is the structure of the following reasoning? (Be careful not to break up hypotheticals.) 3.5.1 Radioactive elements disintegrate and eventually turn into lead. If matter has always existed, there...

What is the structure of the following reasoning? (Be careful not to break up hypotheticals.)

3.5.1 Radioactive elements disintegrate and eventually turn into lead. If matter has always existed, there should be no radioactive elements left. The presence of uranium and other radioactive elements is scientific proof that matter has not always existed.

3.5.2 If the civil population cannot be defended in the event of nuclear war, we do not need a civil defence policy. But we do need a civil defence policy if ‘deterrence’ is to be a convincing strategy. Therefore deterrence is not a convincing strategy.

3.5.3 Questions appendix, passage 7.

3.5.4 If homeopathic pills are too dilute to have any effect, they can’t really help the many people who use them. Since tests have shown they really do work in many cases, they can’t be too weak.