Let this be so.
His means of death, his obscure burial—
No trophy, sword, nor hatchment o'er his bones,
No noble rite nor formal ostentation,
Cry to be heard, as 'twere from heaven to earth,
That I must call't in question.
some events might be birthday parties, school graduation, business meetings, and grand openings
The presence or introduction into the environment of a substance which has a harmful or poisonous effects
Post hoc states that one event led to the following event that came after it. Since event B came after event A, event A caused event B.
This is fallacy because there are things such as coincidences, and an event coming after one doesn't mean they have to be related in any way.