- Nearly all fossils are found in sedimentary rock
- If something is found in something else, then that something else contains that something
- Therefore, sedimentary rocks contain nearly all fossils

Hence, sedimentary rocks contain nearly all fossils
[Question]Which type of rock would most likely contain a fossil?
[Context]- Nearly all fossils are found in sedimentary rock 
- If something is found in something else, then that something else contains that something