That's not it at all, but I can at least see where you're coming from now.Actual explanation:"Oh sure, I acknowledge that we have the ability to walk," - we can physically take steps, a metaphor for the small step in the appearance of a new species (so-called 'micro-evolution')"it's just that I don't believe anyone can walk from one end of the country to the other," - a hyperbolic statement. Of course you could walk across the country, it would just take a long time and MANY steps. A metaphor for how it would take many small steps of micro-evolution in order to reach something we could refer to as 'macro-evolution' wherein we have a totally new genus (is that the word I want?) which can no longer breed with the original animal (actual evolution). This is of course possible, like walking across a continent, it would just a long time and many many individual steps.Personally, I think that was an excellent metaphor. Kudos.