1. Human beings have two arms and two legs. 2. Thalidomide caused some humans to develop without all four complete limbs. These people are still humans. Stat

1. Human beings have two arms and two legs. 2. Thalidomide caused some humans to develop without all four complete limbs. These people are still humans. Statements 1 and 2 aren't contradictory. 3. There are two human sexes. 4. Genetic anomalies cause some humans to develop without a complete set of the primary and secondary sexual characteristics of either sex. These people are still humans. Statements 3 and 4 aren't contradictory.