A property may be classified as either determinate or determinable. Motion is intrinsically indeterminate, but perceptually determinable, with respect to its length. A mutually determinable lease can be determined by either. Thus leaving John with a fee simple determinable and the grantor a possibility of reverter. This diffusion proceeds in an ordered fashion, analytically determinable from the diffusion equation. The former is the determining, the latter the determinable principle. Normally, a possibility of reverter follows a fee simple determinable. The possibility of reverter can only follow a fee simple determinable. The amount of the annuity benefit must be "definitely determinable" as per IRS regulation 1.412-1. Each of these methods, however, results in predictable and determinable errors in the result. Viral transformation can impose characteristically determinable features upon a cell. The causes of nonconformities aren't unlimited and therefore determinable. This type of future interest can only follow the "fee simple determinable". A determinable property is one that can get more specific. This is up to 75 amino acids long, and has no determinable structure.