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I guess you can’t read.

"It’s a question of letting it happen if it happens " is nonsense.

'letting it happen' implies allowing something in the future.        'if it happens' is present tense.

...so, you can't 'let something happen' 'if it happens' unless you can time travel to the past.

so sorry that part of your brain is broken.

[mbrfl]

It’s called a figure of speech moron. Are you just playing dumb or is it the real thing?