Q: If Such anecdotes are remembered and they are convincing., can we say that "Anecdotes are always forgotten."?

A: no

Q: If Not bad not at all bad., can we say that "His basketball skills have greatly improved."?

A: it is not possible to tell

Q: If Benidorm is usually the most expensive resort., can we say that "Benidorm is one of the most famous resorts."?

A: it is not possible to tell

Q: If you're kidding me, can we say that "You're not being serious."?

A:
yes