Passage Summary: You can't make fluffy whipped cream in a blender because there's not enough air, even if you use a special tool.

Reasoning: Blenders produce thick cream instead of fluffy cream because the container doesn't allow enough air in. Special attachments help a bit but can't fix the air intake problem entirely.

Analysis: We are looking for a deduction based strictly on the provided facts. We know two things: fluffy cream requires air, and blenders (even with attachments) lack sufficient air. Therefore, it's impossible to get fully fluffy whipped cream using a blender. The answer will likely be a restatement of this limitation—that no matter what you do with a blender, the air intake will remain a bottleneck for fluffiness.