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.
Confidence votes 5.0K. A sound argument is one that is backed up by personal observation or experience, or more appropriately, logic and reason. An unsound argument is one that can be easily disproved, or is based only on emotion or feelings, or other non-objective means and methods.