Two people walking down a dirt trail with backpacks on looking at items they are carrying .
It is likely that two people are walking outside looking at what they brought for lunch in their backpacks .
There is almost no chance that two people are walking outside looking at what they brought for lunch in their backpacks .
It is likely that two people are walking outside looking at what they brought for lunch in their backpacks .
Two people are walking outside looking at what they brought for lunch in their backpacks .