Final answer:
In Scheme programming, a 'sentence' is a complete expression composed of symbols, numbers, and other expressions that, when evaluated, yield a result. These sentences are structured to encapsulate and convey computational processes or data, paralleling how words form sentences in English.
Step-by-step explanation:
A sentence in a Scheme program refers to a complete expression. In the context of programming, specifically in Scheme, a sentence is akin to an expression made up of symbols, numbers, and can include various types of expressions such as variables, procedures, and combination of sub-expressions that when evaluated, yield a result. This concept is somewhat paralleled to the syntax manner in which words are organized into sentences, with the key difference being that in Scheme or any programming language, the structure and the semantics of the expression define its meaning rather than the inherent meaning of the symbols used.
Let's also consider that where literature weaves together words to build sentences, in mathematics and programming, symbols are used to convey abstract ideas. Scheme is no exception; here, equations can be seen as sentences expressing important concepts. These are not just a sequence of characters or a representation of a mathematical equation, but rather contain a structure that encapsulates some computational process or data.
Understanding Scheme sentences means understanding the function of each part of the expression in a similar way that one would read a sentence in English to grasp its meaning. Rather than seeing them as mere sequences of symbols, one should approach Scheme sentences as well thought-out constructions aiming to impart a specific instruction or truth about the process at hand.