They could argue pedantics until the sun went down, but it would be pointless.

"I haven't decided yet," Devin informed her, looking away again. "It's been quite a few years since I've had blood from the vein, and I'd prefer to maintain that record. This place isn't well-equipped for long-term storage, either, which is a problem on it's own." He grimaced. "The most logical option seems to be to ask for volunteers."