Depending on breed, management and environment, the domestic horse (including draft horses) today has a life expectancy of 25 to 35 years. It is uncommon, but a few animals live into their 40s and, occasionally, beyond. The oldest verifiable record was Old Billy, a 19th-century horse that lived to the age of 62.
TRUE. Validity is a necessary condition for being sound. 14. FALSE. A valid argument can have a true conclusion and false premises (see #11); and if an argument does not have all true premises, then it is not sound.
Arguments can be either explicit or implicit. The main difference between them is the difference between telling and showing. Explicit arguments are good for a debate, while implicit arguments put an idea into your head and indirect. Both are very effective ways of getting your point across if used correctly. Certain situations call for one type, while another will call for a different type of argument.