Statements :

All balls are pencils.

All keys are balls.

Conclusions :

I. Atleast some pencils are keys.

II. All pencils are balls.

(i) All flowers are thorns $o$ Universal Affirmative (A–type). (ii) Some plugs are tablets $o$ Particular Affirmative (I–type). (iii) No tablet is a door $o$ Universal Negative (E–type). (iv) Some tablets are not doors $o$ Particular Negative (O–type).

A + A $Rightarrow$ A–type of Conclusion

“All keys are pencils.”

Conclusion I is the Converse of it.