What do you call using another method when you can't explain something [duplicate]

Solution 1:

I think you're looking for paraphrase [MW]

a restatement of a text, passage, or work giving the meaning in another form

Solution 2:

You are probably looking for verbose.

ODO:

verbose ADJECTIVE

Using or expressed in more words than are needed.
‘much academic language is obscure and verbose’

‘Yesterday I told myself that I needed to stop teasing Kevin Keith about his verbose comments.’
‘I am sure that this email seems overwhelming, and verbose.’
‘She often wondered how could a man be so verbose.’

Solution 3:

I actual thinking he's describing a parable [Wikipedia]

A parable is a succinct, didactic story, in prose or verse, which illustrates one or more instructive lessons or principles.

For example, Jesus used the parable of the mustard seed to explain the joys that would be encountered in heaven from simple beginnings.