gyankalakumbhKNOWLEDGE. ART. POSSIBILITY.Logic & puzzles • Classes 4–5
All, some or none?
One small word can change a whole claim.
Take your time. Speak, draw or write your answers.
Here is what is happening.
“All”, “some” and “none” describe different amounts within a group. If three of five drawn flowers have leaves, some have leaves but not all. To disprove “all five have leaves”, one counterexample is enough. Do not change the group halfway through a claim.
Pause. Make the idea your own.
Explain one idea to a partner, draw it or write it in your own words. Which part is an observation, an example or a question?
You can use a home language. No need to share personal experiences or finish everything in one sitting.Your little investigation
What you need
Paper and a pencil, or a partner to talk with. Drawing and speaking are welcome.
Draw five flowers, giving leaves to exactly three.
Write one true “some” statement and one false “all” statement.
Point to a counterexample that challenges the false statement.
How many counterexamples are enough to disprove “all five have leaves”?
KEEP ASKING
All activities in your group