Read the following paragraph and determine if the hypothesis is true:

How to check engine vacuum hoses<br>Check each hose for bulges and swelling. If a hose feels soft or spongy when you touch it, this can indicate damage caused by your car's oil. [substeps] A swollen hose that is cracked and hard is often caused by heat damage.

Hypothesis: Other things can cause the hose to be soft and spongy
It's impossible to say