Tom says that insulation keeps out the cold. Explain why this statement is incorrect. What should Tom have said?

There is no such thing as"cold", in the same way that there is no such thing

as "darkness" or "quietness". "Darkness" is the absence of light, "quietness"

is the absence of sound, and "cold" is the absence of heat.

Tom should have said that insulation keeps the heat in.

It does in the winter and keeps the heat in. During the summer it keeps in the cold air and keeps out the heat.