def check_interval_intersection(t1a, t1b, t2a, t2b):
    """
    Determine if the intervals (t1a, t1b) and (t2a, t12b) intersect.
    """
    if min(t1a, t1b) < t2a and max(t1a, t1b) > t2a:
        return True
    elif min(t1a, t1b) < t2b and max(t1a, t1b) > t2b:
        return True
    elif min(t2a, t2b) < t1b and max(t2a, t2b) > t1b:
        return True
    else:
        return False