If I plant a tree, then I will get dirt under my nails. I didn’t get dirt under my nails. Therefore, I didn’t plant a tree

If I don’t change my oil regularly, my engine will die. My engine died. Thus, I didn’t change my oil regularly.

All frogs are amphibians. All frogs have gills. Therefore, all amphibians have gills.

You will meet a tall, handsome stranger or you will stay home and pick fleas off of your cat. You didn’t meet and tall, handsome stranger. Therefore, you stayed home and picked fleas off of your cat.

If I don’t tie my shoes, then I trip. I didn’t tie my shoes. Hence, I tripped.