How much do you know about the soil nutrient mix, pH, and microbiome under your feet?
If it does under definition X, do I also "know" about the microbiome in my own body under definition X? The nutrient mix of the food I eat, the oxygen content of the air I breathe?
And certainly, you know your own microbiome!
But I'm assuming you mass less than 9,000 kg, aren't 24 meters tall, and interact with less than 500 m^3 of soil.