Self-study
Shipping Coordinator: If we send your shipment by air express, it will arrive tomorrow morning. ██ ██ ████ ████ ████████ ███ ██████ ████████ ██ ████ ██████ ██████ ████████ ██ ███ ████ ████ ██████ ███████ ██ ████ █████████ ████ ███ ████████ ██ █████ ██ ███ ███████
█████████ ██ █ █████ ██████ ███ ████████ ████ █ ████ ███ ███████ ██ ████████ █████████ ██ █ ███████ ████ ██ ██████ ███ ██ █████ ███ █████ █████ ███ ████ ██ ████ ███ ███ ████████
Analysis
The coordinator describes two shipping options to a customer. Air express is pricier and guarantees the shipment will arrive tomorrow. Ground shipping is cheaper, and it will deliver the package either tomorrow or the day after.
Seemingly skipping over the “either tomorrow or” bit, the customer assumes there’s no chance ground shipping will deliver their package by tomorrow.
Put differently, the customer interprets the fact that a ground-carried shipment could possibly be late as though it means it will definitely be late.
5.
The customer's response can best ██ █████████ ██ ███ ██████████ ████ ███ ███ ██████████████ ███ ████████ ███████████ ██ ████ █████ ███ ██ ███ ██████████
a
Ground carrier is ██ ████████ █ ████████ ██████ ██ ███ ████████
Neither speaker mentions reliability, only the time it will take for a shipment to arrive.
b
If the shipment ██ ████ ██ ███ ████████ ██ ████ ██████ █████████
The coordinator explicitly says this, so this wouldn’t be a misinterpretation.
c
Ground carrier is ███ ████ █████████ ████ ███ ████████
The coordinator says that a ground carrier is cheaper, so this wouldn’t be a misinterpretation.
d
Unless the shipment ██ ████ ██ ███ ████████ ██ ████ ███ ██████ █████████
This describes what the customer misunderstands. According to the coordinator, a ground-carried shipment could arrive tomorrow or the day after, but the customer assumes this means that it would definitely arrive the day after.
(If the above translation is confusing, review unless as a group 3 indicator.)
e
The greater the ████████ █████ ███ ██████ ███ ████████ ████ ███████
The customer is only choosing between two options, so there’s no indication they're committed to this broad rule about shipping costs in general.