Sunk-Cost Cyril
SUNK COST — *refusing to change course because of past investment.* The fallacy of *letting unrecoverable past costs determine current decisions when they should be evaluated independently.*
Listen along — Sunk-Cost Cyril
Loading audio…
Press play to listen along. The line being read lights up as you go.
Show full transcript
Loading transcript…
Chapter 13 — Cyril and the Past-Investment Trap
Cyril was a capybara. He was not very big, but he was very steady. His fur was warm brown and cream. Cyril had a quiet, stubborn way about him. He often got stuck on things. Especially when he had already put a lot of effort into them.
Cyril was building a sandcastle. It was meant to be the best sandcastle ever. He called it “Fort Awesome.” He had worked on it all morning. The sun was hot on his back. He had dug a huge moat. He had piled up mountains of sand. He had even found tiny seashells for decorations.
But Fort Awesome was not awesome. It was… wobbly. The main tower leaned badly. The walls kept sliding down. Every time Cyril added more sand, another part crumbled. He sighed. A big chunk of the north wall just collapsed. It made a soft thump sound.
“Oh, come on!” Cyril muttered. He stared at the sandy mess. He had spent three whole hours on this. Three long, hard hours. He could not just give up now. That would be a waste. All that work would be for nothing.
His friend, Pip the squirrel, scampered up. Pip held a half-eaten acorn. “Hey, Cyril!” she chirped. “How’s Fort Awesome?”
Cyril pointed a sandy paw at the leaning tower. “It’s… challenging,” he said. “The sand is too dry. It won’t hold.”
Pip tilted her head. “It looks like it’s falling apart,” she said simply.
“It is!” Cyril agreed. “But I can’t quit. I’ve already spent so much time. I’ve used up all my best digging energy. I even found a special blue shell for the top.” He picked up the blue shell. It was very pretty.
Pip munched her acorn. “So, it’s not working?” she asked.
“No, it’s really not,” Cyril admitted. He tried to prop up the tower with a stick. The stick sank into the sand. The tower leaned even more.
“Then why keep going?” Pip asked. Her tail twitched.
Cyril looked at her. “Because I’ve already done so much!” he said. “Think of all the digging. All the hauling. All the careful shaping. If I stop now, all that work is wasted. It’s gone.”
Pip looked at the collapsed wall. “But it’s already gone, isn’t it?” she said. “The wall is flat. The tower is wobbly. It’s not a fort.”
Cyril frowned. “No, it’s not gone! It’s… invested. I’ve invested my time. I’ve invested my effort. I have to see it through.” He grabbed a bucket. He started scooping more sand. He dumped it onto the wobbly tower. More sand slid down.
“But if you keep going, and it keeps falling,” Pip said slowly, “then you’re just spending more time. And more effort. On something that’s still falling.”
Cyril paused. He looked at the sand. He looked at the blue shell in his hand. “But if I stop, those three hours are just… poof! Gone forever. Like they never happened.”
“They’re gone anyway, Cyril,” Pip said gently. “Whether you stop or keep going. Those three hours already happened. You can’t get them back.”
Cyril stared at the floor for a long time. He thought about what Pip said. He had spent three hours. The fort was still a mess. If he spent another three hours, and it was still a mess, then he would have spent six hours on a mess.
“So,” Cyril said, “the time I already spent… it doesn’t make the fort better now?”
“Nope,” Pip said. “It just makes you tired.”
“And it doesn’t mean it will get better if I keep going?”
“Not if the sand is too dry,” Pip confirmed.
Cyril looked at the sad, sandy pile. He had wanted a grand fort. He had worked so hard. But it was never going to be a grand fort with this dry sand. His past effort was a heavy weight. It made him want to keep pushing. But Pip was right. The past effort was past. It was done. It was gone. It didn’t change what was happening now.
He picked up the blue shell. “So, I should think about what will happen next?” he asked. “Not what already happened?”
“Exactly!” Pip chirped. “What’s the best thing to do from here?”
Cyril looked at the dry sand. He looked at the ocean. The waves were coming in. The sand closer to the water was wet and firm. Perfect for building.
“I could build a new fort,” Cyril said. “Over there. Where the sand is wet.”
“You could!” Pip agreed. “And it might actually stand up.”
Cyril nodded. He still felt a little sad about Fort Awesome. All that work. But he also felt lighter. He didn’t have to keep fighting the dry sand. He could start fresh. He could use his future time wisely.
He stood up. He brushed sand from his fur. “Okay,” he said. “Fort Awesome Part Two. This time, with wet sand.”
Pip grinned. “Good idea, Cyril!”
Cyril understood something important that day. Just because you’ve spent a lot of time or effort on something, it doesn’t mean you have to keep going. Especially if it’s not working. The time you already spent is gone. It’s better to think about what will happen next. Make your choices based on that. Not on the past.
He is explicit: “I am a teaching archetype, NOT a villain. Past investment is gone either way. Evaluate from future, not past.”
“It is not hard. It is future from here, not past from there.”
The LogicQuest ensemble
Sunk-Cost Cyril is part of LogicQuest's distributed-narrative cast. Each character embodies a different curricular primitive; together they teach the full subject.
-
Ad Hominem Hannibal
Attacking the arguer, not the argument
-
Strawman Stella
Misrepresenting the opponent's argument
-
Slippery-Slope Sam
Chaining dire consequences from a small first step
-
Appeal-to-Authority Auntie
Citing irrelevant / unqualified authority as proof
-
Red-Herring Reggie
Deflecting to an irrelevant topic
-
Circular-Reasoning Cici
Assuming the conclusion in the premise
-
False-Dichotomy Fia
Presenting only two options when more exist
-
Bandwagon Bran
Truth-by-popularity
-
Whataboutism Wanda
Deflecting criticism via someone else's wrongdoing
-
Equivocator Eva
Sliding a word's meaning mid-argument
-
Tu-Quoque Tessa
"You too!" — dismissing criticism by accusing the critic of the same thing
-
Modus-Ponens Mo
If P then Q; P; ∴ Q
-
Modus-Tollens Tara
If P then Q; ¬Q; ∴ ¬P
-
Syllogism Solon
All M are P; all S are M; ∴ all S are P
-
Disjunctive-Syllogism Dior
P ∨ Q; ¬P; ∴ Q