Learn French: Je vends cet objet puisqu'il n'est pas dans ma collection. - I am selling this object since it is not in my collection.

While both can translate to 'since' or 'because', they are used differently. Parce que introduces new information to answer 'why?'. Puisque is used when the reason is already known, obvious, or logical to the listener. Here, the speaker is stating an evident fact: since the object doesn't fit the collection, it makes logical sense to sell it.

Why is it written as puisqu'il with an apostrophe?

The word puisque drops its final -e and adds an apostrophe when the next word starts with a vowel or a mute H. This mandatory contraction (elision) happens before words like il, elle, and on to make the sentence flow more smoothly when spoken.

Why is it cet objet instead of ce objet?

Objet is a masculine singular noun, so the default word for 'this' is ce. However, because objet starts with a vowel, ce changes to cet to avoid having two vowel sounds right next to each other. If it were a feminine noun, you would use cette regardless of the starting letter.

Why do we use dans instead of en for 'in' here?