"What about watermelon and summer squash? They're gourds, aren't they?" Alec asked. "Summer squash are, surely. But... are watermelon gourds?"
"Nah, no way are they gourds," Xander said confidently.
"But they have a hard rind and soft inside," Alec pointed out. "And they are rounded and have seeds inside. It's just like a pumpkin."
Xander hesitated, confidence shaken. "But... No way. Watermelon rind is way softer, and the inside doesn't have a cavity like pumpkins. And pumpkins and squash have similar texture and color."
"A banana is a berry, and it sure doesn't look like a blueberry," Alec pointed out.