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.
Debate, without rebuttals, would merely be a series of speeches with no relation to each other. Like ships passing in the night, there will be no clash, no conflict and ultimately, no debate. Rebuttal, like argumentation, is one of the foundations of debate. What is rebuttal then? It is a speaker saying that an opponent's argument is not valid and showing why it is not valid. If argument is about building logic links in a case, then rebuttal is about the breaking of these links.