declarative sentence
sentence that expresses a proposition
normative statement
expresses a value judgement about whether a situation is subjectively desirable or undesirable
logical paradox
statement that, despite apparently valid reasoning from true premises, leads to an apparently-self-contradictory conclusion
erratum
published correction to a previous publication
positive statement
concerns what "is", "was", or "will be", and contains no indication of approval or disapproval (what should be)
Preamble to the United States Constitution
brief introductory statement of the Constitution's fundamental purposes and guiding principles
non-denial denial
statement which appears to deny that something is true, but which, when examined carefully, can be seen to have used diversion, bluster, or ambiguity to avoid making a clear, direct denial