It's certainly possible to look out at the world of living things and to see only discrete, stand-alone creatures, utterly unrelated. That's exactly what we do see the very first time we open our eyes and look around. But one of the glories of the human mind is that when we look long enough and hard enough, we have the capacity to see similarities and patterns. Ultimately we learn to use the highly refined technique of inductive reasoning, which can lead us to useful theories about the world in which we live -- such as evolution. That's when the Tree of Life takes shape. And then, goodbye lawn.
Deductive and Inductive Thinking.
Except when it comes to detecting design.... so say the Darwininians.
Not completely true. In a lawn, there are plants that are not connected to one another. However, there are also blades of grass that have 'runners' (e.g. roots that travel along under the ground) off which other blades of grass have grown.