Q: A black market, underground economy, or shadow economy is a clandestine market or transaction that has some aspect of illegality or is characterized by some form of noncompliant behavior with an institutional set of rules. If the rule defines the set of goods and services whose production and distribution is prohibited by law, non-compliance with the rule constitutes a black market trade since the transaction itself is illegal. Parties engaging in the production or distribution of prohibited goods and services are members of the illegal economy. Examples include the drug trade, prostitution (where prohibited), illegal currency transactions and human trafficking. Violations of the tax code involving income tax evasion constitutes membership in the unreported economy.
Can we conclude that is it illegal to go on the black market?
A: yes

Q: A tape measure or measuring tape is a flexible ruler and used to measure distance.
Can we conclude that is a tape measure the same as a ruler?
A: yes

Q: Aside from the most common use against small, fast moving targets, the shotgun has several advantages when used against still targets. First, it has enormous stopping power at short range, more than nearly all handguns and many rifles. Though many believe the shotgun is a great firearm for inexperienced shooters, the truth is, at close range, the spread of shot is not very large at all, and competency in aiming is still required. A typical self-defense load of buckshot contains 8--27 large lead pellets, resulting in many wound tracks in the target. Also, unlike a fully jacketed rifle bullet, each pellet of shot is less likely to penetrate walls and hit bystanders. It is favored by law enforcement for its low penetration and high stopping power.
Can we conclude that is a rifle the same as a shotgun?
A: no

Q: Marshmallow creme is an American confection, a rich sweet marshmallow spread usually eaten for breakfast. One brand of marshmallow creme is Marshmallow Fluff, which is used to make the New England ''Fluffernutter'' sandwich. This is manufactured by Durkee-Mower, Inc. Its ingredients include corn syrup, sugar syrup, vanilla flavor, and egg whites.
Can we conclude that is marshmallow cream and marshmallow fluff the same thing?
A:
yes