Unsupported. Most Wednesdays have half-priced coffee, but this doesn’t mean that most half-priced coffee days are Wednesdays. In other words, although Zack’s has half-priced coffee most Wednesdays, they might have half-priced coffee on other days too.

Unsupported. Most Wednesdays have a free poetry reading, but this doesn’t mean that most readings happen on Wednesdays. In other words, although Zack’s has free poetry readings almost every Wednesday, they could have readings on other days too.

Unsupported. All poetry reading days have half-priced coffee, but this doesn’t mean that most half-priced coffee days have poetry readings. It’s possible that most half-priced coffee days happen on days without a reading.

Very strongly supported. On most Wednesdays, Zack’s has free readings. On all reading days, they have half-priced coffee. So on most Wednesdays, they have half-priced coffee. “Most” can include “all.” Either way, they could have half-priced coffee on Wednesdays without readings.

Unsupported. Even if there’s not a reading every Wednesday, there might still be half-priced coffee every Wednesday. “Poetry reading” is merely sufficient for “half-priced coffee.” So not having a reading tells us nothing about whether there will be half-priced coffee.