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.
This has the form: pâq. p. â´ q. This form of argument is calls Modus Ponens (latin for mode that affirms) Note that an argument can be valid, even if one of the premises is false. For example, the argument above doesn't say whether you do or don't have a current password. Maybe you do, and maybe you don't .