If a term is nonsensical, impossible, or lacks sufficient structure in the specification, the claim the term is in will be invalid for indefiniteness.
An entity can be liable for infringement if
1) the entity makes, sells, or offers to sell a product with each and every element of a claim.
2) the entity directs or controls the performance of another entity which together makes, sells, or offers to sell a product with each and every element of a claim.
3) the entity forms a joint enterprise with another entity wherein the joint enterprise makes, sells, or offers to sell a product with each and every element of a claim.