Hypothetical proposition picked up blemishes lots made less of

• Intentionally misrepresented logical proposition
• Specious figure in an argument
• Conveniently weak argument, metaphorically
• Rhetorical creation
• Wily debater’s creation
• Deliberately weak argument metaphor
• Scarecrow, e.g
• Informal fallacy used in an argument

Wiktionary Word definitions in Wiktionary
n. (alternative spelling of straw man English)