Q: A chord of a circle is a straight line segment whose endpoints both lie on the circle. A secant line, or just secant, is the infinite line extension of a chord. More generally, a chord is a line segment joining two points on any curve, for instance an ellipse. A chord that passes through a circle's center point is the circle's diameter. Every diameter is a chord, but not every chord is a diameter.
Can we conclude that is every diameter of a circle is a chord?
A: no

Q: In the 1888 election, Grover Cleveland of New York, the incumbent president and a Democrat, tried to secure a second term against the Republican nominee Benjamin Harrison, a former U.S. Senator from Indiana. The economy was prosperous and the nation was at peace, but although Cleveland received 90,596 more votes than Harrison, he lost in the Electoral College. Harrison won 233 electoral votes, Cleveland only 168.
Can we conclude that has a democrat ever won the electoral college but not the popular vote?
A: yes

Q: The neck, clavicle area and the back of the neck are very sensitive in both males and females, which can be stimulated by licking, kissing or light caressing. Some people also like being bitten gently in these areas, often to the point that a ''hickey'', or ''love-bite'' is formed.
Can we conclude that is the back of the neck an erogenous zone?
A: yes

Q: Brees earned the starting job with the Chargers in 2002 and made the Pro Bowl in 2004. Nine months after suffering a dislocation in his right shoulder joint and a tear of the labrum and rotator cuff, Brees signed with the Saints as a free agent in 2006. He had immediate success in New Orleans, eventually leading the Saints to their first-ever Super Bowl in Super Bowl XLIV, resulting in a 31--17 victory over the Indianapolis Colts.
Can we conclude that has drew brees ever won a super bowl?
A:
yes