Questions & Answers about Мы можем обсудить это когда угодно после обеда.
Можем обсудить means we can discuss or we are able to discuss. It uses:
- можем = we can
- обсудить = to discuss (infinitive)
So the structure is similar to English: we can discuss.
Мы обсуждаем means we are discussing or we discuss, which is a different idea. It does not express ability or possibility.
Because it comes after мочь (to be able / can). In Russian, modal verbs like мочь are followed by an infinitive:
- Я могу прийти = I can come
- Мы можем обсудить = We can discuss
So обсудить stays in the basic dictionary form.