Sentences,Propositions and Predications Ambiguity is a property of sentences,an ambiguous (declarative)sentence may be defined as a (declarative)sentence which expresses more than one proposition. e.g.'Hugo is drawing a cart. --'Hugo is drawing a picture of a cart. --'Hugo is pulling a cart.' Sentences are syntactic units;propositions are semantic units;ambiguity is a one-many relation between syntax and sense.• Ambiguity is a property of sentences, an ambiguous (declarative) sentence may be defined as a (declarative) sentence which expresses more than one proposition. e.g. ‘Hugo is drawing a cart.’ --’Hugo is drawing a picture of a cart.’ --’Hugo is pulling a cart.’ Sentences are syntactic units; propositions are semantic units; ambiguity is a one-many relation between syntax and sense. Sentences, Propositions and Predications